COMPARATIVE SCELETONS&c 
HE frontice-piece reprefents Galen contempla¬ 
ting the fceleton of a robber, who being killed by a 
traveller had his bones picked in two days by vultures: 
This opportunity he mentions as a piece of good for¬ 
tune, though he had feen another fceleton which was 
accidentally walhed out of a burying place, by the 
overflowing of a river; befide£ one which was fliewn in a public fchool 
at Alexandria, which he thought was worth the trouble of any one to 
go on purpofe to ftudy. 
The print in the title page reprefents the camera obfeura, with 
the manner of ufing it: About fix inches within that end where the 
draft iman fits, is fixed the table glafs, upon the rough fide of which he 
draws with a black-lead pencil, which he afterwards traces offupon paper; 
towards the other end, in a Hiding frame, is put the objedt-glafs, which be¬ 
ing moved backward or forward, makes the pidturc bigger or lefs, and the 
infide of the cafe is made black to prevent reflections of light. 
The next print is the QUEENS arms fet upon a pcdeflal; on 
which is rcpielented in bafs relieve, arts and fciences flourifliing under 
her Majesties protection. 
