[70 
It is, however, proper to take notice, that in there 1 
letters an apparatus is defcribed, to be added to Wilfon’s 
microfcope, when thefe glades are made ufe of ; 
which apparatus Mr. Baker was not at the expence of 
procuring, as it would anfwer no other purpofe : but 
the method he contrived, indead thereof, he imagines 
to be equally effedual. 
In truth, Mr. Baker has employed much time and 
his beft endeavours in the examination of thefe glades, 
as they were fuppofed capable of fuch wonderful 
difcoveries : and that as well by candle-light, as (by 
what is recommended) the dronged day-light : and 
yet he mud declare, with forne concern, that through 
the dnalled globule, viz. of one half of a Paris point in 
diameter, he has not been able to didinguifh any 
thing; and even through that which magnifies the 
lead, he could never view any objed with fatisfadion ; 
though he applied the mod minute, and confequently 
the propered objeds for thefe glades, viz. the globules 
of the blood, the farina of vegetables, the feeds of 
mufhrooms, the feathers of butterflies, pepper-water, 
&c. He hopes his eyes are not injured by thefe 
examinations, as they have been much ufed to micro- 
fcopes; but he believes there are very few, who 
would not have been nearly blinded thereby. 
Upon the whole,- — Mr. Baker thinks the Royal 
Society much obliged to the Father di Torre for thefe 
fpecimens of his great dexterity, ingenuity, and pati- 
ence, in forming and letting glafs fpheres thus 
extreamly minute ; but he coniiders them as matters 
of curiofity rather than of real ufe. 
Strand, April 17, 
1766. 
Henry Baker. 
Received 
