**£ I N S 
— A letter on. the effects of elder, in preferving 
grov/ing plants from infecfs and flies Gullet 
Instruments (for anatomical ufes). An explication 
of the inftruments ufed in a new operation of 
the eyes - - Chefelden 
— — A defcription of fome inftruments for the ears 
- C Island 
— A letter concerning the care of a dry gangrene; 
together with a new-invented inftrument for 
the extirpation of tumours out of the reach ©f 
the furgeon’s fingers 
- — — * An account of a new-invented inftrument for 
fra&ured legs - - Sharp 
Instruments (Mathematical). Confiderations upon 
Mr. Hook’s new inftrument for grinding of op- 
tick glalfes, - - Auzout 
Anfwer - - Hook 
— . — A letter touching the invention of dividing a 
foot into many thoufand parts for mathematical 
purpofes - - Townley 
More ways for the fame purpofe Hook 
A defcription of the inftrument for dividing a 
foot into many thoufand parts, and thereby 
meafuring the diameters of planets to great ex- 
adtnefs ** - Hook 
mm — - The defcription of an inftrument invented di- 
vers years ago for drawing the out-lines of any 
object in perfpe&ive - Wren 
— Extradl of two letters concerning an inftrument 
to ftiew the moon’s true place to a minute or 
two - - Flamfiead 
■ Account of a new elfay-inftrument Boyle 
Extract of a letter relating to the eftay-inftru- 
ment 
• Letter about the making of micro fcopes with 
very fmall and ftngle glalfes, and of fome other 
inftruments + - Butterfield 
— — Further remarks on the inftrument, propofed by 
an anonymous French author, for eftedling a 
perpetual motion - Anon, 
An inftrument for feeing the fun, moon, or ftars, 
pafs the meridian of any place : ufeful for fet- 
ting watches in all parts of the world with the 
greateft exa&nefs, to corre& fun-dials, to af- 
fift in the difcovery of the longitude of places 
~ Durham 
L 
; Tran-f. 
LXII 348 
XXXV 451 
XLI 847 
XL VI 72 
L VII 80 
1 56 
— 63 
n 457 
— 459 
— 541 
IV 898 
IX 219 
X 329 
— 353 
XII 1026 
XVI 138 
XXIV 1578 
Abridg. 
VII 493 
IX 124 
XI 1084 
1 213 
— J92 
— 218 
— 220 
— 219 
— 59 8 
— 4S3 
— 516 
— 520 
-127,208 
IV 464 
Ex* 
