Numb. 474; 
PHILOSOPHICAL 
TRANSACTIONS. 
For the Months of June, July-, Auguft , September » 
October, November, and December , 174 4. 
The CONTENTS. 
I. Account of a Differtation publifed in Latin by Dr. Weidlef, 
F. R. S. in the Tear 1727. concerning the vulgar Numeral Fi- 
gures : As alfo fome Remarks upon an Infcription', cut formerly hi a 
Window belonging to the Parifh Chutch of Rumfey in Hampshire': 
By John Ward, F. R. S. Rhet. Prof Grefham. p. 79. 
II. A Letter from the Rev. Mr. Jofeph Betts, M. A. and Fellow of 
Univerfity College, Oxon. to Martin Folkes, Efpy Pr. R. S. con- 
taining Objervations on the late Comet, made at Sherborn and 
Oxford; with the Elements for computing its Motions. p‘ 91. 
III. Obfervatio de Scirrho Cerebelli y ab Alberto Hallero, R. S. S.Archi- 
at. Reg. & Med. Prof. Gotting. <3^ Reg. Soc. tranfmijfa. p. 100. 
IV. An EJfay upon the Caujes of the different Colours of People in 
different Climates ; by John Mitchell, M. D. : Communicated to the 
Royal Society by Mr. Peter Collinfon, F. R.S. p. 102. 
V. A Letter from William Hallett, M. D. to Henry Pemberton, 
M. D. F .R.S. dr Chem. Prof. Grefham. containing the Cafe of 
a Lad y who was (hot thro ’ the Lungs j drawn up by Mr. Nic. 
Peters junior, Surgeon. p. 151. 
VI. Extrahi of a Letter from Dr. John Bartram, to Mr. Peter Col- 
linfon, F. R. S. containing fome Objervations concerning the Salt- 
Marfh Mufcle, the Oyfter-Banks, and the Frefh-Water Mufcle, 
of Penfilvania y p. 177. 
VII. A Letter from Mr. Chrift. Hunter, to Dr. Mortimer, Seer. 
R. S.ferving to accompany a Copy of an anfient Roman Infcription at 
Rocbefter in Northumberland, and two others at Ri fingham p, 150.. 
VI!!. An Account of fome Magnetical Experiments, [hewed before* 
the Royal Society, by Mr: Gowan Knight, on Thurfday the \ ph 
c/November, 1744. p. 161. 
IX. AbftraSl of what is contained in a Book concerning Eledcricity, 
juft publifjed at Leipfic, 1744. by John Henry- Wintler, Greek 
and Latin Profefl'or there. p. 166 
X. Tranflation of a Letter from Mr. Abraham Trembley, F. R. S. 
to the President, with Objervations upon feveral newly difeovered 
Species of Frefh-water Polypi. p. 169. 
