The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
AMERICAN FUNDS WASHINGTON MUTU MF 939330825 736 16,071 SH   SOLE   0 0 16,071
FIDELITY 500 INDEX FUND MF 315911750 1,238 12,057 SH   SOLE   0 0 12,057
FIDELITY CONTRAFUND MF 316071109 1,023 77,642 SH   SOLE   0 0 77,642
FRANKLIN INCOME ADV CL AD MF 353496847 76 33,257 SH   SOLE   0 0 33,257
INVESCO GLOBAL CORE EQUITY CL MF 00141L798 211 14,415 SH   SOLE   0 0 14,415
MFS MASSACHUSETTS INV TRUST CL MF 575736400 693 22,345 SH   SOLE   0 0 22,345
MFS SER GROWTH FUND CL I MF 552985863 215 1,832 SH   SOLE   0 0 1,832
NUVEEN INSD DIV ADV MUNI FD CO MF 67071L106 682 42,948 SH   SOLE   0 0 42,948
NUVEEN MD PREMIUM INC MUNICIPA MF 67061Q107 298 23,025 SH   SOLE   0 0 23,025
PUTNAM MUNI OPPORTUNITIES TR S MF 746922103 155 12,262 SH   SOLE   0 0 12,262
T ROWE PRICE ST TAX FREE INCOM MF 77957R101 261 23,997 SH   SOLE   0 0 23,997
T. ROWE PRICE BLUE CHIP GROWTH MF 77954Q106 240 2,071 SH   SOLE   0 0 2,071
T. ROWE PRICE HIGH-YIELD MF 741481105 74 11,268 SH   SOLE   0 0 11,268
T. ROWE PRICE SMALL-CAP VALUE MF 77957Q103 416 8,846 SH   SOLE   0 0 8,846
VANGUARD WINDSOR FUND ADMIRAL MF 922018304 617 9,719 SH   SOLE   0 0 9,719
3M CO. COM 88579Y101 3,171 18,292 SH   SOLE   0 0 18,292
ABBOTT LABORATORIES COM 002824100 8,191 97,400 SH   SOLE   0 0 97,400
ABBVIE INC COM 00287Y109 1,305 17,952 SH   SOLE   0 0 17,952
ADOBE SYSTEMS INCORPORATED COM 00724F101 4,349 14,760 SH   SOLE   0 0 14,760
AIR PRODUCTS & CHEMICALS COM 009158106 306 1,351 SH   SOLE   0 0 1,351
ALLSTATE CORPORATION COM 020002101 819 8,058 SH   SOLE   0 0 8,058
ALPHABET INC NON-VOTING CL C COM 02079K107 6,677 6,177 SH   SOLE   0 0 6,177
ALPHABET INC VOTING CL A COM 02079K305 528 488 SH   SOLE   0 0 488
ALTRIA GROUP COM 02209S103 208 4,400 SH   SOLE   0 0 4,400
AMAZON.COM INC COM 023135106 8,074 4,264 SH   SOLE   0 0 4,264
AMERICAN EXPRESS INC COM 025816109 3,322 26,915 SH   SOLE   0 0 26,915
AMGEN INC COM 031162100 954 5,176 SH   SOLE   0 0 5,176
ANADARKO PETROLEUM CORP COM 032511107 589 8,354 SH   SOLE   0 0 8,354
APPLE INC COM 037833100 8,394 42,412 SH   SOLE   0 0 42,412
AQUA AMERICA COM 03836W103 6,741 162,949 SH   SOLE   0 0 162,949
ARCHER DANIELS MIDLAND CO COM 039483102 1,147 28,111 SH   SOLE   0 0 28,111
AT&T CORP NEW COM 00206R102 2,006 59,870 SH   SOLE   0 0 59,870
ATMOS ENERGY CORP COM 049560105 1,813 17,175 SH   SOLE   0 0 17,175
BALL CORP COM 058498106 273 3,900 SH   SOLE   0 0 3,900
BANK OF AMERICA COM 060505104 1,200 41,367 SH   SOLE   0 0 41,367
BANK OF NEW YORK MELLON CORP COM 064058100 921 20,864 SH   SOLE   0 0 20,864
BECTON DICKINSON COM 075887109 11,033 43,779 SH   SOLE   0 0 43,779
BERKSHIRE HATHAWAY INC DEL CLA COM 084670108 4,139 13 SH   SOLE   0 0 13
BERKSHIRE HATHAWAY INC DEL CLA COM 084670702 745 3,494 SH   SOLE   0 0 3,494
BOEING COM 097023105 3,603 9,898 SH   SOLE   0 0 9,898
BP PLC SPONS ADR COM 055622104 307 7,367 SH   SOLE   0 0 7,367
BRISTOL-MYERS SQUIBB COMPANY COM 110122108 727 16,023 SH   SOLE   0 0 16,023
C S X CORPORATION COM 126408103 542 7,000 SH   SOLE   0 0 7,000
CABLE ONE INC COM 12685J105 441 377 SH   SOLE   0 0 377
CATERPILLAR INCORPORATED COM 149123101 5,017 36,811 SH   SOLE   0 0 36,811
CHEMOURS CO COM 163851108 17,421 725,884 SH   SOLE   0 0 725,884
CHEVRON CORP COM 166764100 7,560 60,754 SH   SOLE   0 0 60,754
CHURCH & DWIGHT CO INC COM 171340102 11,141 152,493 SH   SOLE   0 0 152,493
CIMAREX ENERGY CO. COM 171798101 225 3,795 SH   SOLE   0 0 3,795
CISCO SYSTEMS INC COM 17275R102 7,734 141,313 SH   SOLE   0 0 141,313
COASTAL CARIBBEAN OILS & MINER COM 190432203 0 69,910 SH   SOLE   0 0 69,910
COCA-COLA COMPANY COM 191216100 2,093 41,100 SH   SOLE   0 0 41,100
COLGATE-PALMOLIVE COMPANY COM 194162103 448 6,252 SH   SOLE   0 0 6,252
COMCAST CORP NEW CL A COM 20030N101 354 8,380 SH   SOLE   0 0 8,380
CONOCOPHILLIPS COM 20825C104 338 5,534 SH   SOLE   0 0 5,534
CORNING INC. COM 219350105 807 24,300 SH   SOLE   0 0 24,300
CORTEVA INC COM 22052L104 32,693 1,105,625 SH   SOLE   0 0 1,105,625
CVS CAREMARK CORPORATION COM 126650100 439 8,050 SH   SOLE   0 0 8,050
DANAHER CORP COM 235851102 604 4,225 SH   SOLE   0 0 4,225
DEERE AND CO. COM 244199105 207 1,250 SH   SOLE   0 0 1,250
DENTSPLY SIRONA INC COM 24906P109 2,585 44,287 SH   SOLE   0 0 44,287
DISCOVER FINANCIAL SERVICES COM 254709108 673 8,677 SH   SOLE   0 0 8,677
DOMINION RESOURCES INC OF VA COM 25746U109 4,163 53,841 SH   SOLE   0 0 53,841
DOVER CORPORATION COM 260003108 229 2,285 SH   SOLE   0 0 2,285
DOW CHEMICAL COMPANY (THE) COM 260543103 54,518 1,105,625 SH   SOLE   0 0 1,105,625
DTE ENERGY COM 233331107 385 3,011 SH   SOLE   0 0 3,011
DU PONT (E.I.) DE NEMOURS & CO COM 263534109 82,999 1,105,624 SH   SOLE   0 0 1,105,624
DUKE ENERGY CORP COM 26441C204 1,434 16,247 SH   SOLE   0 0 16,247
ELI LILLY & CO COM 532457108 534 4,822 SH   SOLE   0 0 4,822
EMERSON ELECTRIC CO. COM 291011104 956 14,331 SH   SOLE   0 0 14,331
ENBRIDGE INC. COM 29250N105 965 26,747 SH   SOLE   0 0 26,747
EXELON CORP COM 30161N101 211 4,406 SH   SOLE   0 0 4,406
EXXON MOBIL CORPORATION COM 30231G102 11,817 154,215 SH   SOLE   0 0 154,215
FEDERAL REALTY INV TR S B I COM 313747206 1,424 11,059 SH   SOLE   0 0 11,059
FEDEX CORP COM 31428X106 5,085 30,973 SH   SOLE   0 0 30,973
FISERV INC COM 337738108 273 3,000 SH   SOLE   0 0 3,000
FORTIVE CORP COM 34959J108 302 3,710 SH   SOLE   0 0 3,710
FRANKLIN RESOURCES INC COM 354613101 783 22,495 SH   SOLE   0 0 22,495
GENERAL ELECTRIC COMPANY COM 369604103 2,356 224,336 SH   SOLE   0 0 224,336
GENERAL MILLS INC COM 370334104 732 13,944 SH   SOLE   0 0 13,944
GRAHAM HOLDINGS CO. COM 384637104 241 349 SH   SOLE   0 0 349
HEALTH CARE PPTY INVS COM 40414L109 212 6,624 SH   SOLE   0 0 6,624
HERSHEY COMPANY COM 427866108 1,583 11,812 SH   SOLE   0 0 11,812
HOME DEPOT COM 437076102 1,025 4,930 SH   SOLE   0 0 4,930
HONEYWELL INTERNATIONAL INC COM 438516106 2,973 17,028 SH   SOLE   0 0 17,028
ILLINOIS TOOL WORKS INC. COM 452308109 10,108 67,022 SH   SOLE   0 0 67,022
INTEL CORP COM COM 458140100 6,157 128,628 SH   SOLE   0 0 128,628
INTERNATIONAL BUSINESS MACHINE COM 459200101 3,052 22,132 SH   SOLE   0 0 22,132
INTERNATIONAL FLAVORS & FRAGRA COM 459506101 218 1,500 SH   SOLE   0 0 1,500
INTERNATIONAL PAPER CO COM 460146103 247 5,709 SH   SOLE   0 0 5,709
INTUIT INC COM 461202103 941 3,600 SH   SOLE   0 0 3,600
ISHARES MSCI EAFE INDEX COM 464287465 393 5,984 SH   SOLE   0 0 5,984
ISHARES NASDAQ BIOTECH INDEX COM 464287556 5,862 53,726 SH   SOLE   0 0 53,726
ISHARES RUSSELL 2000 IDX COM 464287655 5,004 32,179 SH   SOLE   0 0 32,179
ISHARES RUSSELL MIDCAP INDEX COM 464287499 6,935 124,123 SH   SOLE   0 0 124,123
JOHNSON & JOHNSON COM 478160104 15,774 113,257 SH   SOLE   0 0 113,257
JPMORGAN CHASE & CO. COM 46625H100 10,494 93,862 SH   SOLE   0 0 93,862
KELLOGG COMPANY COM 487836108 2,255 42,096 SH   SOLE   0 0 42,096
KEYCORP COM 493267108 224 12,600 SH   SOLE   0 0 12,600
KIMBERLY-CLARK CORP COM 494368103 2,982 22,372 SH   SOLE   0 0 22,372
LABORATORY CORP OF AMERICA COM 50540R409 989 5,722 SH   SOLE   0 0 5,722
LINDE PLC COM G5494J103 407 2,025 SH   SOLE   0 0 2,025
LOCKHEED MARTIN COM 539830109 691 1,900 SH   SOLE   0 0 1,900
LOWES COS COM 548661107 10,993 108,943 SH   SOLE   0 0 108,943
M & T BANK CORP COM 55261F104 2,304 13,550 SH   SOLE   0 0 13,550
MANPOWER INC WISCONSIN COM 56418H100 456 4,724 SH   SOLE   0 0 4,724
MARRIOTT INTERNATIONAL, NEW IN COM 571903202 7,648 54,516 SH   SOLE   0 0 54,516
MC DONALD'S CORPORATION COM 580135101 11,997 57,772 SH   SOLE   0 0 57,772
MEDTRONIC INC COM G5960L103 466 4,782 SH   SOLE   0 0 4,782
MERCK & COMPANY INCORPORATED N COM 58933Y105 6,182 73,729 SH   SOLE   0 0 73,729
MICROSOFT CORPORATION COM 594918104 17,310 129,220 SH   SOLE   0 0 129,220
MONDELEZ INTL INC COM 609207105 256 4,747 SH   SOLE   0 0 4,747
MORGAN STANLEY & CO COM 617446448 653 14,908 SH   SOLE   0 0 14,908
MOTOROLA SOLUTIONS, INC COM 620076307 864 5,184 SH   SOLE   0 0 5,184
NATIONAL FUEL GAS CO COM 636180101 201 3,818 SH   SOLE   0 0 3,818
NESTLE SA REG ADR COM 641069406 227 2,200 SH   SOLE   0 0 2,200
NEXTERA ENERGY COM 65339F101 4,533 22,127 SH   SOLE   0 0 22,127
NORFOLK SOUTHERN CORP COM 655844108 299 1,500 SH   SOLE   0 0 1,500
NORTHERN TRUST CORP COM 665859104 936 10,400 SH   SOLE   0 0 10,400
ORACLE CORP COM 68389X105 448 7,868 SH   SOLE   0 0 7,868
PEPSICO INCORPORATED COM 713448108 12,340 94,104 SH   SOLE   0 0 94,104
PFIZER INCORPORATED COM 717081103 1,613 37,245 SH   SOLE   0 0 37,245
PHILIP MORRIS INTERNATIONAL COM 718172109 383 4,875 SH   SOLE   0 0 4,875
PHILLIPS 66 COM 718546104 433 4,626 SH   SOLE   0 0 4,626
PIONEER NAT RES CO COM 723787107 231 1,500 SH   SOLE   0 0 1,500
PNC FINANCIAL SERVICES GROUP COM 693475105 500 3,644 SH   SOLE   0 0 3,644
POWERSHARES QQQ TR ETF SERIES COM 73935A104 1,160 6,211 SH   SOLE   0 0 6,211
PROCTER & GAMBLE COMPANY COM 742718109 14,800 134,979 SH   SOLE   0 0 134,979
PUBLIC SERVICE ENTERPRISE GROU COM 744573106 278 4,725 SH   SOLE   0 0 4,725
SAUL CENTERS INC. COM 804395101 392 6,978 SH   SOLE   0 0 6,978
SELECT SECTOR SPDR TR UTILITIE COM 81369Y886 268 4,500 SH   SOLE   0 0 4,500
SMUCKER J.M. CO COM 832696405 577 5,006 SH   SOLE   0 0 5,006
SOUTHERN COMPANY (THE) COM 842587107 2,983 53,958 SH   SOLE   0 0 53,958
SPDR S&P 500 ETF COM 78462F103 331 1,128 SH   SOLE   0 0 1,128
SYSCO CORPORATION COM 871829107 1,234 17,450 SH   SOLE   0 0 17,450
T ROWE PRICE GROUP INC. COM 74144T108 11,228 102,339 SH   SOLE   0 0 102,339
TARGET CORP COM 87612E106 529 6,105 SH   SOLE   0 0 6,105
TEXAS INSTRUMENTS COM 882508104 742 6,465 SH   SOLE   0 0 6,465
THE TJX COMPANIES COM 872540109 212 4,000 SH   SOLE   0 0 4,000
THE TRAVELERS COS INC COM 89417E109 617 4,127 SH   SOLE   0 0 4,127
THERMO FISHER SCIENTIFIC COM 883556102 468 1,595 SH   SOLE   0 0 1,595
UDR INC COM 902653104 922 20,549 SH   SOLE   0 0 20,549
UNILEVER COM 904784709 291 4,800 SH   SOLE   0 0 4,800
UNION PACIFIC CORP COM 907818108 6,204 36,688 SH   SOLE   0 0 36,688
UNITED HEALTHCARE CORP COM 91324P102 6,068 24,868 SH   SOLE   0 0 24,868
UNITED TECHNOLOGIES CORP COM COM 913017109 7,795 59,868 SH   SOLE   0 0 59,868
US BANCORP DEL (NEW) COM 902973304 251 4,781 SH   SOLE   0 0 4,781
VANGUARD EMERGING MARKETS ETF COM 922042858 786 18,489 SH   SOLE   0 0 18,489
VANGUARD FTSE DEVELOPED MARKET COM 921943858 1,211 29,024 SH   SOLE   0 0 29,024
VANGUARD INFORMATION TECHNOLOG COM 92204A702 45,182 214,242 SH   SOLE   0 0 214,242
VANGUARD MID CAP ETF COM 922908629 5,792 34,649 SH   SOLE   0 0 34,649
VANGUARD REIT ETF COM 922908553 566 6,480 SH   SOLE   0 0 6,480
VANGUARD S&P ETF COM 922908363 902 3,350 SH   SOLE   0 0 3,350
VANGUARD SMALL CAP ETF COM 922908751 4,342 27,713 SH   SOLE   0 0 27,713
VANGUARD TOTAL STOCK MARKET COM 922908769 2,720 18,120 SH   SOLE   0 0 18,120
VERIZON COMMUNICATIONS COM 92343V104 3,955 69,225 SH   SOLE   0 0 69,225
VISA INC CLASS A COM 92826C839 11,696 67,393 SH   SOLE   0 0 67,393
VULCAN MATERIALS CO COM 929160109 330 2,400 SH   SOLE   0 0 2,400
WAL-MART STORES INC COM 931142103 353 3,192 SH   SOLE   0 0 3,192
WALGREENS BOOTS ALLIANCE, INC. COM 931427108 4,304 78,720 SH   SOLE   0 0 78,720
WALT DISNEY COMPANY COM 254687106 8,876 63,562 SH   SOLE   0 0 63,562
WASH REAL ESTATE INV TRUST S B COM 939653101 2,311 86,475 SH   SOLE   0 0 86,475
WASTE CONNECTIONS INC COM 94106B101 363 3,800 SH   SOLE   0 0 3,800
WEINGARTEN REALTY INVS S B I COM 948741103 2,185 79,689 SH   SOLE   0 0 79,689
WELLS FARGO & CO. NEW COM 949746101 5,465 115,485 SH   SOLE   0 0 115,485
WEYERHAEUSER CO COM 962166104 338 12,837 SH   SOLE   0 0 12,837
WHITE MOUNTAINS INS. COM G9618E107 203 199 SH   SOLE   0 0 199
YUM BRANDS INC COM 988498101 221 1,995 SH   SOLE   0 0 1,995
ZIMMER BIOMET HOLDINGS INC. COM 98956P102 393 3,340 SH   SOLE   0 0 3,340