An antique engraving entitled "A true Representation of Several Microscopes with some Objects and their proper Aparatus" it is from The Universal Magazine of Knowledge and Pleasure published by John Hinton in 1750. A charming and original print. 
 
The engraving measures 274 x 210mm (10.79" x 10.25"), wear to the edges outside the plate impression marks, otherwise in clear, crisp condition; this item will be shipped flat.