CHEMICAL AND PHILOSOPHICAL APPARATUS. 



Separate Descriptive Catalogues, illustrated by Cuts, may be had of the Articles 

 named in the following List. 



ACHROMATIC MICROSCOPES. 



Microscopes of the most improved Forms, and with excellent Achromatic 

 Lenses, at Five, Ten, and Sixteen Guineas each. The Instrument at Five 

 Guineas is suitable for the Investigation of Urinary Deposits, and for most 

 Medical and Botanical Observations. 



PHOTOGRAPHIC APPARATUS, 



For taking Pictures on Glass, Paper, or Silver, including the most unproved 

 Forms of Camera, and Lenses of the best quality. 



METALLURGY. 



All the Apparatus for the ASSAYING of METALS and the ANALYSIS of ORES : 

 Including Cupelling Furnaces, with the proper Tools ; Graduated Vessels 

 for Centigrade Testing, &c. ; Pans for Gold-washing, &c. See the Figures 

 in PHILLIPS'S MANUAL OF MET ALLURGY, just published. 



MINERALOGY and GEOLOGY. 



Collections of Metallic Ores, of Simple Minerals, of Rocks, and of Fossils, 

 scientifically arranged and catalogued. In Sets, of from 100 to 500 speci- 

 mens, at a great variety of Prices. 



PORTABLE CHEMICAL CABINETS. 



A great variety of PORTABLE CABINETS, with properly-arranged Collec- 

 tions of Chemical Apparatus and Preparations for performing Experiments, 

 at from 16s. to 211. The arrangements are different, so as to suit 



a. Persons commencing the Study of Chemistry. 



b. Teachers desirous of giving Lessons in Chemistry. 



c. Metallurgists or Travelling Engineers. 



d. Medical Experiments on Urinary Deposits, &c. 



SHIER' S SUGAR TEST. 



Apparatus for determining the Quantity of Lime necessary to Clarify Cane 

 Juice. In a Deal Box, 4Z. In Mahogany, 4?. 10s. 



TOOL CHESTS. 



For Gentlemen, Emigrants, &c., at from 12s. 6d. to 8/. 8s. 



MISCELLANEOUS APPARATUS, 



For every branch of Analytical and Demonstrative Chemistry, and for Ex- 

 periments in Pneumatics, Electricity, Galvanism, Optics, and other Depart- 

 ments ; particulars of which are given in " Griffin's Illustrated Catalogue 

 of Chemical and Philosophical Apparatus," 8vo, 1200 figures. Price 2s. 



JOHN J. GRIFFIN & CO. LONDON. R. GRIFFIN & CO. GLASGOW. 



