<TABLE>
<CAPTION>
<S>
ISSUE CLASS CUSIP VALUE SHRS/PRN AMT SH/PRN PT/CL INV DES OTHR MNGR SOLE SHRD NONE
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
Abbott Labs COM 002824100 " 3,241 " " 71,420 " SH SOLE " 71,420 "
Abbott Labs COM 002824100 177 " 3,900 " SH OTHER " 3,900 "
Airtouch Communications COM 00949T100 293 " 2,640 " SH SOLE " 2,640 "
Airtouch Communications COM 00949T100 21 185 SH OTHER 185
AlliedSignal COM 019512102 " 1,792 " " 28,445 " SH SOLE " 28,445 "
AlliedSignal COM 019512102 832 " 13,200 " SH OTHER " 13,200 "
American Express COM 025816109 232 " 1,780 " SH SOLE " 1,780 "
American Express COM 025816109 631 " 4,850 " SH OTHER " 4,850 "
American Home Products COM 026609107 " 1,302 " " 22,700 " SH SOLE " 22,700 "
American Home Products COM 026609107 608 " 10,600 " SH OTHER " 10,600 "
American International Group COM 026874107 " 4,517 " " 38,526 " SH SOLE " 38,526 "
American International Group COM 026874107 329 " 2,810 " SH OTHER " 2,810 "
Ameritech Corp. COM 030954101 147 " 2,000 " SH SOLE " 2,000 "
Ameritech Corp. COM 030954101 131 " 1,784 " SH OTHER " 1,784 "
AT & T Corp. COM 001957109 " 1,340 " " 24,004 " SH SOLE " 24,004 "
AT & T Corp. COM 001957109 95 " 1,698 " SH OTHER " 1,698 "
Banc One COM 06423A103 736 " 12,360 " SH SOLE " 12,360 "
Bank of New York COM 064057102 " 3,480 " " 94,852 " SH SOLE " 94,852 "
Bank of New York COM 064057102 216 " 5,880 " SH OTHER " 5,880 "
Bell Atlantic COM 077853109 895 " 13,696 " SH SOLE " 13,696 "
Bell Atlantic COM 077853109 663 " 10,138 " SH OTHER " 10,138 "
BellSouth COM 079860102 821 " 17,808 " SH SOLE " 17,808 "
BellSouth COM 079860102 124 " 2,692 " SH OTHER " 2,692 "
Berkshire Hathaway Class A COM 084670108 207 3 SH SOLE 3
Berkshire Hathaway Class B COM 084670207 233 104 SH SOLE 104
Best Foods COM 126149103 794 " 16,050 " SH SOLE " 16,050 "
BP Amoco PLC COM 055622104 78 722 SH SOLE 722
BP Amoco PLC COM 055622104 843 " 7,770 " SH OTHER " 7,770 "
Bristol Myers Squibb COM 110097102 " 4,120 " " 58,496 " SH SOLE " 58,496 "
Bristol Myers Squibb COM 110097102 " 1,233 " " 17,500 " SH OTHER " 17,500 "
Broken Hill Proprietary ADR 112169206 447 " 18,816 " SH OTHER " 18,816 "
Campbell COM 134429109 394 " 8,500 " SH SOLE " 8,500 "
Charles E. Smith Residential Realty COM 832197107 351 " 10,355 " SH OTHER " 10,355 "
Chevron Corporation COM 166751107 742 " 7,810 " SH SOLE " 7,810 "
Cintas Corp COM 172908105 " 1,460 " " 21,725 " SH SOLE " 21,725 "
Circuit City Stores COM 172737108 303 " 3,255 " SH SOLE " 3,255 "
Cisco Systems COM 17275R102 " 7,054 " " 109,464 " SH SOLE " 109,464 "
Cisco Systems COM 17275R102 106 " 1,650 " SH OTHER " 1,650 "
Citigroup COM 172967101 203 " 4,275 " SH SOLE " 4,275 "
Citigroup COM 172967101 36 750 SH OTHER 750
Coca Cola COM 191216100 " 2,299 " " 37,078 " SH SOLE " 37,078 "
Cohen & Steers Realty MF 294710512 52 " 57,618 " SH SOLE " 57,618 "
Colgate-Palmolive Company COM 194162103 394 " 4,000 " SH SOLE " 4,000 "
Computer Sciences COM 205363104 " 2,802 " " 40,500 " SH SOLE " 40,500 "
Corning COM 219327103 575 " 8,200 " SH SOLE " 8,200 "
CSX Corp. COM 126408103 395 " 8,700 " SH SOLE " 8,700 "
Dow Chemical COM 260543103 279 " 2,200 " SH SOLE " 2,200 "
Du Pont COM 263534109 " 2,420 " " 35,430 " SH SOLE " 35,430 "
Du Pont COM 263534109 642 " 9,400 " SH OTHER " 9,400 "
Elan COM 284131208 222 " 8,000 " SH SOLE " 8,000 "
EMC Corp. COM 268648102 " 5,016 " " 91,200 " SH SOLE " 91,200 "
Emerson Electric Co. COM 291011104 264 " 4,200 " SH SOLE " 4,200 "
EV Marathon MD Tax Fund MF 27826L827 235 " 22,800 " SH SOLE " 22,800 "
Exxon COM 302290101 " 3,072 " " 39,831 " SH SOLE " 39,831 "
Exxon COM 302290101 " 1,234 " " 16,000 " SH OTHER " 16,000 "
Fiduciary Trust COM 316495100 299 " 6,260 " SH SOLE " 6,260 "
Fleet Financial Group COM 338915101 290 " 6,527 " SH SOLE " 6,527 "
Gannett Co. Inc. COM 364730101 659 " 9,230 " SH SOLE " 9,230 "
General Electric COM 369604103 " 14,517 " " 128,465 " SH SOLE " 128,465 "
General Electric COM 369604103 " 4,255 " " 37,655 " SH OTHER " 37,655 "
General Mills COM 370334104 385 " 4,785 " SH OTHER " 4,785 "
Gillette COM 375766102 " 1,235 " " 30,132 " SH SOLE " 30,132 "
GTE Corp. COM 362320103 333 " 4,414 " SH SOLE " 4,414 "
GTE Corp. COM 362320103 30 400 SH OTHER 400
Halliburton COM 406216101 83 " 1,834 " SH SOLE " 1,834 "
Halliburton COM 406216101 664 " 14,682 " SH OTHER " 14,682 "
Harley Davidson COM 412822108 218 " 4,000 " SH SOLE " 4,000 "
Hershey Foods COM 427866108 " 2,566 " " 43,210 " SH SOLE " 43,210 "
Hershey Foods COM 427866108 12 200 SH OTHER 200
Hewlett Packard COM 428236103 " 3,641 " " 36,225 " SH SOLE " 36,225 "
Hewlett Packard COM 428236103 693 " 6,900 " SH OTHER " 6,900 "
Honeywell COM 438506107 411 " 3,550 " SH OTHER " 3,550 "
IBM COM 459200101 " 1,245 " " 9,636 " SH SOLE " 9,636 "
IBM COM 459200101 13 100 SH OTHER 100
Intel COM 458140100 " 1,493 " " 25,085 " SH SOLE " 25,085 "
Intel COM 458140100 280 " 4,700 " SH OTHER " 4,700 "
Japan Fund MF 471070102 526 " 49,185 " SH OTHER " 49,185 "
Johnson & Johnson COM 478160104 " 4,069 " " 41,525 " SH SOLE " 41,525 "
Johnson & Johnson COM 478160104 39 400 SH OTHER 400
Keycorp COM 493263107 500 " 15,566 " SH SOLE " 15,566 "
Lifetech COM 531938108 - " 10,285 " SH SOLE " 10,285 "
Lowes Cos. COM 548661107 57 " 1,000 " SH SOLE " 1,000 "
Lowes Cos. COM 548661107 283 " 5,000 " SH OTHER " 5,000 "
Lucent Technologies COM 549463107 " 5,552 " " 82,327 " SH SOLE " 82,327 "
Lucent Technologies COM 549463107 " 1,445 " " 21,432 " SH OTHER " 21,432 "
May Department Stores COM 577778103 245 " 6,000 " SH SOLE " 6,000 "
McDonalds Corp. COM 580135101 " 3,581 " " 87,074 " SH SOLE " 87,074 "
McDonalds Corp. COM 580135101 74 " 1,800 " SH OTHER " 1,800 "
MCI WorldCom COM 55268B106 575 " 6,682 " SH SOLE " 6,682 "
MCI WorldCom COM 55268B106 336 " 3,908 " SH OTHER " 3,908 "
Medimmune COM 584699102 203 " 3,000 " SH SOLE " 3,000 "
Merck COM 589331107 " 7,350 " " 99,833 " SH SOLE " 99,833 "
Merck COM 589331107 214 " 2,900 " SH OTHER " 2,900 "
Merrill Lynch & Co. COM 590188108 246 " 3,100 " SH SOLE " 3,100 "
Merrill Lynch & Co. COM 590188108 8 100 SH OTHER 100
"Merrill Lynch & Co., Mitts 06/14/02" MF 590188710 97 " 10,000 " SH SOLE " 10,000 "
Microsoft COM 594918104 " 15,403 " " 170,792 " SH SOLE " 170,792 "
Microsoft COM 594918104 974 " 10,800 " SH OTHER " 10,800 "
Minnesota Mining & Manufacturing COM 604059105 304 " 3,500 " SH SOLE " 3,500 "
Mobil COM 607080108 " 1,432 " " 14,501 " SH SOLE " 14,501 "
Mobil COM 607080108 " 1,541 " " 15,600 " SH OTHER " 15,600 "
Molex Inc Class A COM 462218108 435 " 13,800 " SH SOLE " 13,800 "
Morgan Stanley Asia Pacific Fund MF 61744U106 103 " 10,750 " SH OTHER " 10,750 "
Motorola COM 620076109 704 " 7,430 " SH SOLE " 7,430 "
Motorola COM 620076109 57 600 SH OTHER 600
Newell Rubbermaid COM 651229106 366 " 7,883 " SH SOLE " 7,883 "
Pepsico COM 713448108 " 3,218 " " 83,192 " SH SOLE " 83,192 "
Pepsico COM 713448108 228 " 5,900 " SH OTHER " 5,900 "
Pfizer COM 717081103 " 5,142 " " 47,175 " SH SOLE " 47,175 "
Pfizer COM 717081103 11 100 SH OTHER 100
Philadelphia Suburban COM 718009608 251 " 10,863 " SH SOLE " 10,863 "
Pioneer Hi Bred COM 723686101 " 14,971 " " 384,477 " SH OTHER " 384,477 "
Procter & Gamble COM 742716109 " 6,193 " " 69,385 " SH SOLE " 69,385 "
Procter & Gamble COM 742716109 " 2,912 " " 32,630 " SH OTHER " 32,630 "
Raytheon Class B COM 755111101 " 1,069 " " 15,164 " SH SOLE " 15,164 "
Reliastar Financial Corp COM 7595ZU103 " 1,839 " " 42,030 " SH OTHER " 42,030 "
SBC Communications COM 78378G103 883 " 15,230 " SH SOLE " 15,230 "
SBC Communications COM 78378G103 151 " 2,604 " SH OTHER " 2,604 "
Schlumberger COM 806857108 995 " 15,619 " SH SOLE " 15,619 "
Sysco COM 871829107 " 1,467 " " 49,200 " SH SOLE " 49,200 "
T. Rowe Price COM 741477103 " 5,825 " " 151,800 " SH SOLE " 151,800 "
T. Rowe Price COM 741477103 8 200 SH OTHER 200
Time Warner Inc. COM 887315109 291 " 4,000 " SH SOLE " 4,000 "
Time Warner Inc. COM 887315109 113 " 1,550 " SH OTHER " 1,550 "
Walgreen Co. COM 931422109 " 3,072 " " 104,565 " SH SOLE " 104,565 "
Walt Disney COM 254687106 " 4,540 " " 147,330 " SH SOLE " 147,330 "
Walt Disney COM 254687106 142 " 4,600 " SH OTHER " 4,600 "
Washington Gas Light Company COM 938837101 333 " 12,820 " SH SOLE " 12,820 "
Washington Real Estate Investment Trust COM 939653101 688 " 40,630 " SH SOLE " 40,630 "
Washington Real Estate Investment Trust COM 939653101 41 " 2,400 " SH OTHER " 2,400 "
Weis Markets COM 948849104 297 " 7,593 " SH SOLE " 7,593 "
Wells Fargo & Co. COM 949746101 " 2,054 " " 48,050 " SH SOLE " 48,050 "
WM Wrigley COM 982526105 642 " 7,200 " SH SOLE " 7,200 "
</TABLE>
