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
3M CO. COM 88579Y101 4,287 24,132 SH   SOLE   0 0 24,132
ABBOTT LABORATORIES COM 002824100 12,558 89,230 SH   SOLE   0 0 89,230
ABBVIE INC COM 00287Y109 2,376 17,548 SH   SOLE   0 0 17,548
ADOBE SYSTEMS INCORPORATED COM 00724F101 8,326 14,682 SH   SOLE   0 0 14,682
AIR PRODUCTS & CHEMICALS COM 009158106 416 1,368 SH   SOLE   0 0 1,368
ALLSTATE CORPORATION COM 020002101 622 5,287 SH   SOLE   0 0 5,287
ALPHABET INC NON-VOTING CL C COM 02079K107 18,476 6,385 SH   SOLE   0 0 6,385
ALPHABET INC VOTING CL A COM 02079K305 1,460 504 SH   SOLE   0 0 504
ALTRIA GROUP COM 02209S103 209 4,400 SH   SOLE   0 0 4,400
AMAZON.COM INC COM 023135106 15,425 4,626 SH   SOLE   0 0 4,626
AMERICAN ELECTRIC POWER COM 025537101 273 3,067 SH   SOLE   0 0 3,067
AMERICAN EXPRESS INC COM 025816109 4,487 27,428 SH   SOLE   0 0 27,428
AMETEK INC COM 031100100 224 1,522 SH   SOLE   0 0 1,522
AMGEN INC COM 031162100 1,113 4,946 SH   SOLE   0 0 4,946
APPLE INC COM 037833100 30,896 173,992 SH   SOLE   0 0 173,992
ARCHER DANIELS MIDLAND CO COM 039483102 1,032 15,266 SH   SOLE   0 0 15,266
AT&T CORP NEW COM 00206R102 1,087 44,197 SH   SOLE   0 0 44,197
ATMOS ENERGY CORP COM 049560105 2,533 24,177 SH   SOLE   0 0 24,177
BANK OF AMERICA COM 060505104 1,913 43,005 SH   SOLE   0 0 43,005
BANK OF NEW YORK MELLON CORP COM 064058100 1,009 17,366 SH   SOLE   0 0 17,366
BECTON DICKINSON COM 075887109 11,559 45,964 SH   SOLE   0 0 45,964
BERKSHIRE HATHAWAY INC DEL CLA COM 084670108 4,056 9 SH   SOLE   0 0 9
BERKSHIRE HATHAWAY INC DEL CLA COM 084670702 1,311 4,385 SH   SOLE   0 0 4,385
BOEING COM 097023105 1,938 9,628 SH   SOLE   0 0 9,628
BRISTOL-MYERS SQUIBB COMPANY COM 110122108 939 15,053 SH   SOLE   0 0 15,053
C S X CORPORATION COM 126408103 951 25,303 SH   SOLE   0 0 25,303
CABLE ONE INC COM 12685J105 552 313 SH   SOLE   0 0 313
CARRIER GLOBAL COM 14448C104 711 13,117 SH   SOLE   0 0 13,117
CATERPILLAR INCORPORATED COM 149123101 7,539 36,468 SH   SOLE   0 0 36,468
CHEMOURS CO COM 163851108 22,016 656,023 SH   SOLE   0 0 656,023
CHEVRON CORP COM 166764100 6,337 54,003 SH   SOLE   0 0 54,003
CHURCH & DWIGHT CO INC COM 171340102 15,411 150,351 SH   SOLE   0 0 150,351
CINTAS CORP COM 172908105 237 535 SH   SOLE   0 0 535
CISCO SYSTEMS INC COM 17275R102 9,146 144,324 SH   SOLE   0 0 144,324
COCA-COLA COMPANY COM 191216100 2,407 40,646 SH   SOLE   0 0 40,646
COLGATE-PALMOLIVE COMPANY COM 194162103 482 5,652 SH   SOLE   0 0 5,652
COMCAST CORP NEW CL A COM 20030N101 387 7,682 SH   SOLE   0 0 7,682
CONOCOPHILLIPS COM 20825C104 349 4,834 SH   SOLE   0 0 4,834
CORNING INC. COM 219350105 841 22,600 SH   SOLE   0 0 22,600
CORTEVA INC COM 22052L104 48,230 1,020,098 SH   SOLE   0 0 1,020,098
CVS CAREMARK CORPORATION COM 126650100 903 8,750 SH   SOLE   0 0 8,750
DANAHER CORP COM 235851102 1,257 3,820 SH   SOLE   0 0 3,820
DEERE AND CO. COM 244199105 415 1,210 SH   SOLE   0 0 1,210
DENTSPLY SIRONA INC COM 24906P109 1,585 28,414 SH   SOLE   0 0 28,414
DISCOVER FINANCIAL SERVICES COM 254709108 360 3,111 SH   SOLE   0 0 3,111
DOMINION RESOURCES INC OF VA COM 25746U109 4,259 54,217 SH   SOLE   0 0 54,217
DOVER CORPORATION COM 260003108 460 2,535 SH   SOLE   0 0 2,535
DOW CHEMICAL COMPANY (THE) COM 260543103 59,858 1,055,333 SH   SOLE   0 0 1,055,333
DTE ENERGY COM 233331107 359 3,004 SH   SOLE   0 0 3,004
DU PONT (E.I.) DE NEMOURS & CO COM 263534109 71,951 890,697 SH   SOLE   0 0 890,697
DUKE ENERGY CORP COM 26441C204 1,487 14,171 SH   SOLE   0 0 14,171
ELI LILLY & CO COM 532457108 1,332 4,822 SH   SOLE   0 0 4,822
EMERSON ELECTRIC CO. COM 291011104 1,292 13,901 SH   SOLE   0 0 13,901
ENBRIDGE INC. COM 29250N105 953 24,373 SH   SOLE   0 0 24,373
ESSENTIAL UTILITIES INC COM 29670G102 9,427 175,591 SH   SOLE   0 0 175,591
EXXON MOBIL CORPORATION COM 30231G102 7,510 122,735 SH   SOLE   0 0 122,735
FEDERAL REALTY INV TR S B I COM 313745101 1,290 9,464 SH   SOLE   0 0 9,464
FEDEX CORP COM 31428X106 7,211 27,879 SH   SOLE   0 0 27,879
FISERV INC COM 337738108 321 3,090 SH   SOLE   0 0 3,090
FRANKLIN RESOURCES INC COM 354613101 727 21,720 SH   SOLE   0 0 21,720
GENERAL ELECTRIC COMPANY COM 369604301 1,546 16,361 SH   SOLE   0 0 16,361
GENERAL MILLS INC COM 370334104 847 12,574 SH   SOLE   0 0 12,574
GRAHAM HOLDINGS CO. COM 384637104 218 346 SH   SOLE   0 0 346
HEALTH PEAK PROPERTIES INC COM 42250P103 272 7,524 SH   SOLE   0 0 7,524
HERSHEY COMPANY COM 427866108 2,421 12,512 SH   SOLE   0 0 12,512
HOME DEPOT COM 437076102 2,465 5,940 SH   SOLE   0 0 5,940
HONEYWELL INTERNATIONAL INC COM 438516106 4,970 23,836 SH   SOLE   0 0 23,836
HP INC COM 40434L105 295 7,819 SH   SOLE   0 0 7,819
ILLINOIS TOOL WORKS INC. COM 452308109 14,438 58,502 SH   SOLE   0 0 58,502
INTEL CORP COM COM 458140100 6,666 129,444 SH   SOLE   0 0 129,444
INTERNATIONAL BUSINESS MACHINE COM 459200101 2,197 16,437 SH   SOLE   0 0 16,437
INTERNATIONAL FLAVORS & FRAGRA COM 459506101 18,321 121,613 SH   SOLE   0 0 121,613
INTERNATIONAL PAPER CO COM 460146103 268 5,709 SH   SOLE   0 0 5,709
INTUIT INC COM 461202103 2,316 3,600 SH   SOLE   0 0 3,600
ISHARES MSCI EAFE INDEX COM 464287465 333 4,230 SH   SOLE   0 0 4,230
ISHARES NASDAQ BIOTECH INDEX COM 464287556 9,741 63,822 SH   SOLE   0 0 63,822
ISHARES RUSSELL 2000 IDX COM 464287655 6,512 29,275 SH   SOLE   0 0 29,275
ISHARES RUSSELL MIDCAP INDEX COM 464287499 9,350 112,640 SH   SOLE   0 0 112,640
JOHNSON & JOHNSON COM 478160104 18,304 106,997 SH   SOLE   0 0 106,997
JPMORGAN CHASE & CO. COM 46625H100 14,761 93,220 SH   SOLE   0 0 93,220
KELLOGG COMPANY COM 487836108 2,621 40,691 SH   SOLE   0 0 40,691
KIMBERLY-CLARK CORP COM 494368103 2,705 18,927 SH   SOLE   0 0 18,927
KIMCO REALTY CORP REIT COM 49446R109 1,517 61,546 SH   SOLE   0 0 61,546
LABORATORY CORP OF AMERICA COM 50540R409 2,125 6,762 SH   SOLE   0 0 6,762
LINDE PLC COM G5494J103 461 1,330 SH   SOLE   0 0 1,330
LOCKHEED MARTIN COM 539830109 822 2,312 SH   SOLE   0 0 2,312
LOWES COS COM 548661107 23,954 92,673 SH   SOLE   0 0 92,673
M & T BANK CORP COM 55261F104 2,081 13,550 SH   SOLE   0 0 13,550
MANPOWER INC WISCONSIN COM 56418H100 460 4,724 SH   SOLE   0 0 4,724
MARRIOTT INTERNATIONAL, NEW IN COM 571903202 10,424 63,086 SH   SOLE   0 0 63,086
MARRIOTT VACATIONS WORLDWIDE C COM 57164Y107 300 1,775 SH   SOLE   0 0 1,775
MC DONALD'S CORPORATION COM 580135101 15,112 56,375 SH   SOLE   0 0 56,375
MEDTRONIC INC COM G5960L103 555 5,367 SH   SOLE   0 0 5,367
MERCK & COMPANY INCORPORATED N COM 58933Y105 6,678 87,137 SH   SOLE   0 0 87,137
MICROSOFT CORPORATION COM 594918104 39,331 116,944 SH   SOLE   0 0 116,944
MONDELEZ INTL INC COM 609207105 394 5,947 SH   SOLE   0 0 5,947
MORGAN STANLEY & CO COM 617446448 866 8,820 SH   SOLE   0 0 8,820
MOTOROLA SOLUTIONS, INC COM 620076307 1,381 5,084 SH   SOLE   0 0 5,084
NATIONAL FUEL GAS CO COM 636180101 273 4,268 SH   SOLE   0 0 4,268
NESTLE SA REG ADR COM 641069406 353 2,518 SH   SOLE   0 0 2,518
NEW YORK TIMES CL A COM 650111107 232 4,800 SH   SOLE   0 0 4,800
NEXTERA ENERGY COM 65339F101 8,745 93,673 SH   SOLE   0 0 93,673
NIKE INC CLASS B COM 654106103 273 1,638 SH   SOLE   0 0 1,638
NORFOLK SOUTHERN CORP COM 655844108 456 1,531 SH   SOLE   0 0 1,531
NORTHERN TRUST CORP COM 665859104 1,244 10,400 SH   SOLE   0 0 10,400
NORTHROP GRUMMAN CORP COM 666807102 503 1,300 SH   SOLE   0 0 1,300
NVIDIA CORP COM 67066G104 2,003 6,811 SH   SOLE   0 0 6,811
ORACLE CORP COM 68389X105 735 8,429 SH   SOLE   0 0 8,429
OTIS WORLDWIDE INC COM 68902V107 704 8,082 SH   SOLE   0 0 8,082
PEPSICO INCORPORATED COM 713448108 16,666 95,942 SH   SOLE   0 0 95,942
PFIZER INCORPORATED COM 717081103 1,766 29,900 SH   SOLE   0 0 29,900
PHILIP MORRIS INTERNATIONAL COM 718172109 419 4,410 SH   SOLE   0 0 4,410
PIONEER NAT RES CO COM 723787107 255 1,400 SH   SOLE   0 0 1,400
PNC FINANCIAL SERVICES GROUP COM 693475105 1,054 5,258 SH   SOLE   0 0 5,258
POWERSHARES QQQ TR ETF SERIES COM 73935A104 2,501 6,286 SH   SOLE   0 0 6,286
PROCTER & GAMBLE COMPANY COM 742718109 21,202 129,613 SH   SOLE   0 0 129,613
PUBLIC SERVICE ENTERPRISE GROU COM 744573106 296 4,440 SH   SOLE   0 0 4,440
QUALCOMM INC COM 747525103 265 1,450 SH   SOLE   0 0 1,450
RAYTHEON TECHNOLOGIES CORP COM 75513E101 7,241 84,139 SH   SOLE   0 0 84,139
SAUL CENTERS INC. COM 804395101 357 6,728 SH   SOLE   0 0 6,728
SELECT SECTOR SPDR TR UTILITIE COM 81369Y886 322 4,500 SH   SOLE   0 0 4,500
SMUCKER J.M. CO COM 832696405 680 5,006 SH   SOLE   0 0 5,006
SOUTHERN COMPANY (THE) COM 842587107 3,154 45,985 SH   SOLE   0 0 45,985
SPDR S&P 500 ETF COM 78462F103 536 1,128 SH   SOLE   0 0 1,128
SYSCO CORPORATION COM 871829107 1,393 17,732 SH   SOLE   0 0 17,732
T ROWE PRICE GROUP INC. COM 74144T108 17,771 90,372 SH   SOLE   0 0 90,372
TARGET CORP COM 87612E106 1,099 4,750 SH   SOLE   0 0 4,750
TESLA MOTORS INC COM 88160R101 230 218 SH   SOLE   0 0 218
TEXAS INSTRUMENTS COM 882508104 1,462 7,758 SH   SOLE   0 0 7,758
THE TJX COMPANIES COM 872540109 304 4,000 SH   SOLE   0 0 4,000
THE TRAVELERS COS INC COM 89417E109 632 4,039 SH   SOLE   0 0 4,039
THERMO FISHER SCIENTIFIC COM 883556102 827 1,239 SH   SOLE   0 0 1,239
TRIMBLE NAVIGATION COM 896239100 296 3,400 SH   SOLE   0 0 3,400
UDR INC COM 902653104 1,181 19,679 SH   SOLE   0 0 19,679
UNILEVER PLC SPONS ADR COM 904767704 269 5,000 SH   SOLE   0 0 5,000
UNION PACIFIC CORP COM 907818108 8,088 32,104 SH   SOLE   0 0 32,104
UNITED HEALTHCARE CORP COM 91324P102 11,589 23,079 SH   SOLE   0 0 23,079
UNITED PARCEL SERVICE INC CL B COM 911312106 202 943 SH   SOLE   0 0 943
US BANCORP DEL (NEW) COM 902973304 240 4,269 SH   SOLE   0 0 4,269
VANGUARD EMERGING MARKETS ETF COM 922042858 838 16,935 SH   SOLE   0 0 16,935
VANGUARD FTSE DEVELOPED MARKET COM 921943858 1,415 27,703 SH   SOLE   0 0 27,703
VANGUARD INFORMATION TECHNOLOG COM 92204A702 90,202 196,873 SH   SOLE   0 0 196,873
VANGUARD MID CAP ETF COM 922908629 8,795 34,520 SH   SOLE   0 0 34,520
VANGUARD REIT ETF COM 922908553 2,532 21,827 SH   SOLE   0 0 21,827
VANGUARD S&P ETF COM 922908363 1,242 2,845 SH   SOLE   0 0 2,845
VANGUARD SMALL CAP ETF COM 922908751 6,310 27,917 SH   SOLE   0 0 27,917
VANGUARD TOTAL STOCK MARKET COM 922908769 5,820 24,105 SH   SOLE   0 0 24,105
VERIZON COMMUNICATIONS COM 92343V104 4,039 77,733 SH   SOLE   0 0 77,733
VISA INC CLASS A COM 92826C839 12,466 57,523 SH   SOLE   0 0 57,523
VULCAN MATERIALS CO COM 929160109 498 2,400 SH   SOLE   0 0 2,400
WAL-MART STORES INC COM 931142103 1,179 8,146 SH   SOLE   0 0 8,146
WALGREENS BOOTS ALLIANCE, INC. COM 931427108 902 17,285 SH   SOLE   0 0 17,285
WALT DISNEY COMPANY COM 254687106 11,022 71,157 SH   SOLE   0 0 71,157
WASH REAL ESTATE INV TRUST S B COM 939653101 1,557 60,240 SH   SOLE   0 0 60,240
WASTE CONNECTIONS INC COM 94106B101 259 1,900 SH   SOLE   0 0 1,900
WELLS FARGO & CO. NEW COM 949746101 5,131 106,948 SH   SOLE   0 0 106,948
WEYERHAEUSER CO COM 962166104 277 6,729 SH   SOLE   0 0 6,729
WHITE MOUNTAINS INS. COM G9618E107 202 199 SH   SOLE   0 0 199
YUM BRANDS INC COM 988498101 307 2,214 SH   SOLE   0 0 2,214
ZIMMER BIOMET HOLDINGS INC. COM 98956P102 381 3,000 SH   SOLE   0 0 3,000