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  <infoTable>
    <nameOfIssuer>Abbott</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>002824100</cusip>
    <value>20738</value>
    <shrsOrPrnAmt>
      <sshPrnamt>286715</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>286715</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Abbvie</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>00287Y109</cusip>
    <value>25067</value>
    <shrsOrPrnAmt>
      <sshPrnamt>271915</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>271915</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Allstate</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>020002101</cusip>
    <value>29003</value>
    <shrsOrPrnAmt>
      <sshPrnamt>351000</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>351000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>AMAG</nameOfIssuer>
    <titleOfClass>Cv 2.5%</titleOfClass>
    <cusip>00163UAA4</cusip>
    <value>4400</value>
    <shrsOrPrnAmt>
      <sshPrnamt>4500000</sshPrnamt>
      <sshPrnamtType>PRN</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>4500000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Amerco</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>023586100</cusip>
    <value>57881</value>
    <shrsOrPrnAmt>
      <sshPrnamt>176410</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>176410</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Apple</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>037833100</cusip>
    <value>13511</value>
    <shrsOrPrnAmt>
      <sshPrnamt>85600</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>85600</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Ashland</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>044209104</cusip>
    <value>1774</value>
    <shrsOrPrnAmt>
      <sshPrnamt>25000</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>25000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Valvoline</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>92047W101</cusip>
    <value>1328</value>
    <shrsOrPrnAmt>
      <sshPrnamt>68633</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>68633</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Avista</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>05379B107</cusip>
    <value>10811</value>
    <shrsOrPrnAmt>
      <sshPrnamt>254500</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>254500</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Allergan</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>G0177J108</cusip>
    <value>15582</value>
    <shrsOrPrnAmt>
      <sshPrnamt>116600</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>116600</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>CMS Energy</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>125896100</cusip>
    <value>26721</value>
    <shrsOrPrnAmt>
      <sshPrnamt>538300</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>538300</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Compass Minerals</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>20451N101</cusip>
    <value>2501</value>
    <shrsOrPrnAmt>
      <sshPrnamt>60000</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>60000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Bunge</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>G16962105</cusip>
    <value>801</value>
    <shrsOrPrnAmt>
      <sshPrnamt>15000</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>15000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Bunge</nameOfIssuer>
    <titleOfClass>Pfd 4.875%</titleOfClass>
    <cusip>G16962204</cusip>
    <value>3627</value>
    <shrsOrPrnAmt>
      <sshPrnamt>37400</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>37400</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Duke Energy</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>26441C204</cusip>
    <value>30014</value>
    <shrsOrPrnAmt>
      <sshPrnamt>347788</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>347788</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>EDAP</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>268311107</cusip>
    <value>1934</value>
    <shrsOrPrnAmt>
      <sshPrnamt>1045494</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>1045494</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Inotek</nameOfIssuer>
    <titleOfClass>Cv 5.75%</titleOfClass>
    <cusip>45780VAB8</cusip>
    <value>1920</value>
    <shrsOrPrnAmt>
      <sshPrnamt>2000000</sshPrnamt>
      <sshPrnamtType>PRN</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>2000000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Exxon</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>30231G102</cusip>
    <value>353</value>
    <shrsOrPrnAmt>
      <sshPrnamt>5184</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>5184</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Flotek</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>343389102</cusip>
    <value>724</value>
    <shrsOrPrnAmt>
      <sshPrnamt>664335</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>664335</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Fluidigm</nameOfIssuer>
    <titleOfClass>Cv 2.75%</titleOfClass>
    <cusip>34385PAA6</cusip>
    <value>4633</value>
    <shrsOrPrnAmt>
      <sshPrnamt>5009000</sshPrnamt>
      <sshPrnamtType>PRN</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>5009000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Nextera Energy</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>302571104</cusip>
    <value>42190</value>
    <shrsOrPrnAmt>
      <sshPrnamt>242700</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>242700</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Novavax</nameOfIssuer>
    <titleOfClass>Cv 3.75%</titleOfClass>
    <cusip>670002AB0</cusip>
    <value>1837</value>
    <shrsOrPrnAmt>
      <sshPrnamt>3000000</sshPrnamt>
      <sshPrnamtType>PRN</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>3000000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>GM</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>37045V100</cusip>
    <value>10536</value>
    <shrsOrPrnAmt>
      <sshPrnamt>315000</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>315000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Goldcorp</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>380956409</cusip>
    <value>1960</value>
    <shrsOrPrnAmt>
      <sshPrnamt>200000</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>200000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>IBM</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>459200101</cusip>
    <value>15885</value>
    <shrsOrPrnAmt>
      <sshPrnamt>139800</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>139800</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Insteel</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>45774W108</cusip>
    <value>3884</value>
    <shrsOrPrnAmt>
      <sshPrnamt>160000</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>160000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>WEC Energy</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>976657106</cusip>
    <value>1601</value>
    <shrsOrPrnAmt>
      <sshPrnamt>23124</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>23124</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Actua</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>46059C205</cusip>
    <value>130</value>
    <shrsOrPrnAmt>
      <sshPrnamt>130000</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>130000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Kellogg</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>487836108</cusip>
    <value>252</value>
    <shrsOrPrnAmt>
      <sshPrnamt>4436</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>4436</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Mannkind</nameOfIssuer>
    <titleOfClass>Cv 5.75%</titleOfClass>
    <cusip>56400PAM4</cusip>
    <value>11587</value>
    <shrsOrPrnAmt>
      <sshPrnamt>18690000</sshPrnamt>
      <sshPrnamtType>PRN</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>18690000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Merck</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>589331107</cusip>
    <value>27461</value>
    <shrsOrPrnAmt>
      <sshPrnamt>359400</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>359400</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Paratek</nameOfIssuer>
    <titleOfClass>Cv 4.75%</titleOfClass>
    <cusip>699374AA2</cusip>
    <value>10147</value>
    <shrsOrPrnAmt>
      <sshPrnamt>13300000</sshPrnamt>
      <sshPrnamtType>PRN</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>13300000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Pfizer</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>717081103</cusip>
    <value>24240</value>
    <shrsOrPrnAmt>
      <sshPrnamt>555332</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>555332</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Pernix</nameOfIssuer>
    <titleOfClass>Cv 4.25%</titleOfClass>
    <cusip>71426VAK4</cusip>
    <value>250</value>
    <shrsOrPrnAmt>
      <sshPrnamt>2000000</sshPrnamt>
      <sshPrnamtType>PRN</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>2000000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>RLI</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>749607107</cusip>
    <value>3043</value>
    <shrsOrPrnAmt>
      <sshPrnamt>44120</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>44120</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Solitario</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>8342EP107</cusip>
    <value>58</value>
    <shrsOrPrnAmt>
      <sshPrnamt>254040</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>254040</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Supernus</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>868459108</cusip>
    <value>4918</value>
    <shrsOrPrnAmt>
      <sshPrnamt>148058</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>148058</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Synergy</nameOfIssuer>
    <titleOfClass>Cv 7.5%</titleOfClass>
    <cusip>871639AA8</cusip>
    <value>1356</value>
    <shrsOrPrnAmt>
      <sshPrnamt>2500000</sshPrnamt>
      <sshPrnamtType>PRN</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>2500000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Team</nameOfIssuer>
    <titleOfClass>Cv 5%</titleOfClass>
    <cusip>878155AD2</cusip>
    <value>1999</value>
    <shrsOrPrnAmt>
      <sshPrnamt>2000000</sshPrnamt>
      <sshPrnamtType>PRN</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>2000000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>Bausch Health</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
    <cusip>91911K102</cusip>
    <value>17731</value>
    <shrsOrPrnAmt>
      <sshPrnamt>960000</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>960000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>XM Sirius</nameOfIssuer>
    <titleOfClass>Common</titleOfClass>
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