Numb. 459. 
PHILOSOPHICAL 
TRANSACTIONS. 
For the Months of January, February, and March , 
1741- 
The CONTENTS. 
I. The Figure of a Machine for grinding Lenfes fpherically, invented 
by Mr. Samuel Jenkins, and communicated by him to the Hon s Sir 
HansSloane, Bart. Pr. R. S. &c. ” a 2 - 55 L 
II. Obfervatio de immodico & funeflo Lapidum Cancrorum, Jitnili- 
unique terreflrium Abforbentium Ufu , indeque ortis Cal cults in Ven- 
triculo & Renibus : <zjoh. Philippo Breynio, M. D.R.S.S. cumD. 
Hans Sloane, R. S. Pr, &c. communicata. 557 - 
III. A Tetter from the Rev. Mr. S. Kirkfh'aw ^ William Sloan e,£/j; 
F. R. S. concerning Two Pigs of Lead, found near Ripley ^jwith this 
Infcription on them. Imp. C^es. DoMiTiANO Aug. Cos. V It. 5 °* 
IV. The Defection and Draught of a Machine for reducing of frac- 
tures of the Thigh, by Mr. Henry Ettrick, Surgeon. 562. 
V. De Oftreis Petrefadtis Relatio Cornelii le Bruyn, lllufirata per ) ac. 
Theodor. Klein, R. S. S. Rep. Gedan. a Secret. 568. 
VI. Obfervationes Martis, Autumno Anni 1736. Berolim habit a, a 
Chriftfr. Kirch, Regiae Societatis ibidem Afronomo. 573 -. 
VI I. A Collection of the Obfervauons of the Remarkable Red Lights 
feen in the Air on Dec. 5. 1737. fent from diferent Places to the 
Royal Society. , _ 1/r • 5 rs’ 
VIII. A fbort Account of Dr. Jurin’r Ninth and lafl DiJJertation ue 
Vi Motrice, by Mr. John Eames, F. R. S. j °7 
IX. An Account of fome remarkable Stones , taken out of the Kidneys 
of Mrs. Felles, upon opening her Body after her Deceafe, by Isoah 
Sherwood, Surgeon. OI . IO " 
X. A Defcription of a latge Lake called Malholm Tam 5 Tie at okipton 
in Craven, in the County of Yorkfhire j by John Fuller, Ffq\ jun. 
FRs 612: 
XI. " ExtraB of a Tetter from Monfietir De Bremond, M.D. to Dr. 
Mortimer, concerning a File rendered Magnetical by Tight nmg. 
7 6I4- 
XII. An 
