Cassell, Petter, & Ga /pin's 

 MICROSCOPES, 



FOR SCHOOL USE AND PRIVATE STUDY. 



s. d. 



THE SOCIETY OF ARTS PRIZE SCHOOL MICRO- 

 SCOPE, with Rack-and-Pinion Adjustment, three Magnifiers, 

 which, being used separately and combined, give seven 

 different Powers, Condenser, Animalcule Cage, Concave 

 Mirror, &c., in polished Mahogany Case ... ... ... 10 6 



Ditto, with Body and Eye-piece, converting it into a Com- 

 pound Microscope 13 o 



IMPROVED SCHOOL MICROSCOPE, with Superior 

 Achromatic Combination, magnifying 20 and 90 diameters, 

 in neat Mahogany Cabinet, with Brass Forceps, and two 

 Glass Slips .,, ... ... ... " ... ... ... ... 21 o 



COMPOUND ACHROMATIC MICROSCOPE, on Brass 

 Foot and Uprights, Rack-and-Pinion Adjustment, two 

 Achromatic Powers, Huyghenian Eye-pieces, Axis for In- 

 clination, Stage, Pliers, Tweezersj &c., in Polished Cabinet 38 o 



THE EDUCATIONAL MICROSCOPE, Rack Adjustment, 

 mounted on elegant Tripod Stand, with corrected Huyghe- 

 nian Eye-piece and a Superior English Achromatic Com- 

 bination, giving a magnifying power of about 30,000 times 

 superficial, in polished Mahogany Cabinet . 42 o 



COMPOUND ACHROMATIC MICROSCOPE, on Bronze 

 Stand, very powerful, axial inclination, Huyghenian Eye- 

 piece, Condenser on Separate Stand, three Achromatic 



Powers 45 o 



Ditto, ditto, larger. Concave Mirror, c 50 o 



THE STUDENT'S MODEL MICROSCOPE, recommended 

 by the Society of Arts, on Bronze Stand, to incline at any 

 angle, with Rackwork Adjustment, Stage, two Huyghenian 

 Eye-pieces, Condensing Lens on sliding upright Stand, Plane 

 and Concave Mirrors, Revolving Diaphragm, and two 

 superior Achromatic Object-glasses, in a superior polished 

 Mahogany Cabinet, with lock and key 63 o 



CASSELL, PETTED & GALPIN, LONDON, PARIS', AND NE'W YORK. 



