MAGNETIC OBSERVATIONS, 1r¥s5_ 
(+ Common-Saffron\, Fraxinus (+ White-A/h) Chry- 
fanthemum? (St. Authony’s cro/s) Convallaria (+ Solo- 
mons feal. Different fpecies are ufed.), Ulmus—America- 
na? (* +? American Elm) Ofmunda virginiana sim 
an Ofmunda, Fern-Rattle-Snake-root),  Jufliea?—( * + 
Wood-Plantain, Rattle-Snake-Plantain) Hieracium Kalimit 
(* + Rattle-Snake-P lantain, Poor-Robin’s Plantain). 
NN? 
MAGNETIC: OBSERVATIONS, 
Made at the Univerlity of Cambridge (Maffachufetts) in the year 178 Se 
By Dr. S. WILLIAMS, 
ee ee 
Great- Leaft [pie- |, Mean | Mean | Mean 
Months. Days. eft Va- Varia~ | fer. | ¥4tation) Variation] Variation 
riation. tion. jence. 
January 13 P.M. | 6° 50! 6228’ | 3% 
~) 
February IZ P.M. | 6 39 5 49 | 50 
March 1a P.M. | 6 52 6 28 | 24 
April ges MEM 7112) 6 20 |] 52 
May w%zP.M./7 5 6 28 | 45 
June 1ZP.M.]7 8 -M. | 6 29 | 39 
July ti P.M. 1 7 11 .M. } 6 33 | 38 
Auguft 13 P.M. | 7 13 -M. | 6 25 | 48 
Septem. t rz P.M. | 6 55 -M. | 6 13. 42 
Gctober rP.M. [7 11 -M. | 6 27 | 44 
Novem. t 1P.M.|6 59 |29 9 P.M. | 617] 42 
Decem t IP.M.| 658 |19 7A.M. | 6 28 | 30 
Ja thes | eee lt eb 6 edible 6 
Year, Jsuguit 6and 21.) 7 13 | February 23.] 5 49 [1 24 40 | -6 51 39 
“The above Obfervations were made with an excellent Variation Inftrument, with a twelve 
Inch Needle. 
2 Accurate 
