<TABLE>
FORM 13F INFORMATION TABLE
VALUE SHARES/ SH/ PUT/ INVSTMT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE
------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- --------
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
ABBOTT LABORATORIES COM 002824100 575 12900 SH SOLE 12900
AMERICAN EXPRESS CO. COM 025816109 4835 92755 SH SOLE 92755
AMERICAN HOME PRODUCTS CORP. COM 026609107 1496 25456 SH SOLE 25456
AMERICAN INTERNATIONAL GROUP COM 026874107 5611 47752 SH SOLE 47752
ANALOG DEVICES, INC. COM 032654105 3124 41100 SH SOLE 41100
BELL ATLANTIC CORP. COM 077853109 471 9278 SH SOLE 9278
BERKSHIRE HATHAWAY CL A COM 084670108 1345 25 SH SOLE 25
BERKSHIRE HATHAWAY CL B COM 084670207 5194 2951 SH SOLE 2951
BIOTECH HLDRS DEP RCPTS COM 09067d201 231 1300 SH SOLE 1300
BOSTON PROPERTIES INC. COM 101121101 1905 49325 SH SOLE 49325
BP AMOCO PLC SPONS ADR COM 055622104 1005 17761 SH SOLE 17761
BRISTOL MYERS SQUIBB CO. COM 110122108 6303 108210 SH SOLE 108210
CISCO SYSTEMS, INC. COM 17275R102 8763 137867 SH SOLE 137867
CNF TRANSPORTATION INC. COM 12612W104 385 16940 SH SOLE 16940
COCA COLA CO. COM 191216100 644 11209 SH SOLE 11209
CORNING INC. COM 219350105 304 1128 SH SOLE 1128
DUKE-WEEKS REALTY CORP. COM 264411505 1865 83372 SH SOLE 83372
EASTMAN KODAK CO. COM 277461109 388 6525 SH SOLE 6525
EMC CORPORATION COM 268648102 5199 67568 SH SOLE 67568
EMERSON ELECTRIC CO. COM 291011104 1974 32690 SH SOLE 32690
EQUITY OFFICE PROPERTIES TR COM 294741103 4284 155430 SH SOLE 155430
ERICSSON LM TEL SEK 10B ADR COM 294821400 8926 446300 SH SOLE 446300
EXXON MOBIL CORP. COM 30231G102 979 12471 SH SOLE 12471
FIRST YEARS INC. COM 337610109 318 28600 SH SOLE 28600
FLEETBOSTON FINANCIAL CORP. COM 33901A108 728 21423 SH SOLE 21423
GANNETT CO. COM 364730101 216 3606 SH SOLE 3606
GENERAL ELECTRIC CO. COM 369604103 6316 119174 SH SOLE 119174
GILLETTE CO. COM 375766102 5594 160103 SH SOLE 160103
GTE CORP. COM 362320103 2765 44419 SH SOLE 44419
INTEL CORP. COM 458140100 17275 129222 SH SOLE 129222
INTERNATIONAL BUSINESS MACHINE COM 459200101 2711 24743 SH SOLE 24743
J. P. MORGAN & CO. COM 616880100 318 2887 SH SOLE 2887
JOHNSON & JOHNSON COM 478160104 9402 92290 SH SOLE 92290
KIMBERLY CLARK CORP. COM 494368103 2771 48299 SH SOLE 48299
LUCENT TECHNOLOGIES COM COM 549463107 4646 78408 SH SOLE 78408
MCDONALDS CORP. COM 580135101 4157 126210 SH SOLE 126210
MERCK & CO. INC. COM 589331107 7765 101332 SH SOLE 101332
MERRILL LYNCH & CO. COM 590188108 2990 26000 SH SOLE 26000
MICROSOFT CORP. COM 594918104 10978 137220 SH SOLE 137220
MINNESOTA MINING & MANUF. CO. COM 604059105 415 5031 SH SOLE 5031
MOTOROLA INC. COM 620076109 893 30717 SH SOLE 30717
NESTLE SPON ADR REPSTG REG SH COM 641069406 591 5890 SH SOLE 5890
NEXTEL COMMUNICATIONS COM 65332V103 624 10200 SH SOLE 10200
NOVARTIS ADR COM 66987V109 576 14410 SH SOLE 14410
ORACLE SYSTEMS CORPORATION COM 68389X105 4085 48591 SH SOLE 48591
PARAMETRIC TECHNOLOGY CP COM 699173100 5881 534680 SH SOLE 534680
PE BIOSYSTEMS GROUP COM 69332S102 524 7950 SH SOLE 7950
PFIZER, INC. COM 717081103 7354 153202 SH SOLE 153202
PROCTOR AND GAMBLE COM 742718109 3906 68219 SH SOLE 68219
RADIOSHACK CORP. COM 875382103 661 13950 SH SOLE 13950
REUTERS GROUP PLC SPON ADR COM 76132M102 868 8684 SH SOLE 8684
SCHERING PLOUGH CORP COM 806605101 9564 189393 SH SOLE 189393
STATE STREET CORP. COM 857477103 266 2510 SH SOLE 2510
STERIS CORPORATION COM 859152100 909 102460 SH SOLE 102460
STMICROELECTRONICS N.V. COM 861012102 6628 103263 SH SOLE 103263
SUN MICROSYSTEMS INC. COM 866810104 393 4320 SH SOLE 4320
TELEFONICA SA SPAIN ADR COM 879382208 2682 41861 SH SOLE 41861
UNUMPROVIDENT CORP. COM 91529Y106 246 12260 SH SOLE 12260
WALT DISNEY CO. COM 254687106 3393 87412 SH SOLE 87412
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