CHEMICAL & PHILOSOPHICAL APPARATUS 



SUITABLE FOR THE EXHIBITION OF 



Class (jfemiraenis m Sdentifir 



JOHN J. GRIFFIN, F.C.S., begs leave to direct the attention of Lecturers 

 on Experimental Science to his extensive Collection of Apparatus, adapted for 

 the Exhibition of Popular Experiments illustrative of the leading principles 

 of Mechanical, Physical, and Chemical Science ; particularly of 



CHEMISTRY 



HEAT 



PNEUMATICS 



HYDROSTATICS 



MECHANICS 



ELECTRICITY 



GALVANISM 



MAGNETISM 



ELECTRO-MAGNETISM 



OPTICS 



The Instruments can be supplied singly, or in sets adapted to specific 

 Lectures, or for the illustration of each particular Science. The collection 

 embraces many of the instruments described in Dr. FARADAY'S Lectures on 

 the Various Forces of Matter. 



** A printed Catalogue may be had of a Series of Collections of Cheap 

 Apparatus suitable for use in Elementary Schools. A set of these Instru- 

 ments is exhibited in the South Kensington Museum. 



PORTABLE CABINETS OF SCIENTIFIC 

 APPARATUS, 



Containing the materials for performing the Elementary Experiments of each 

 of the Sciences. Chemical Cabinets at 12s., 31s. 6d., 42s., 52s. 6d., and 

 ^5. 5s. Cabinets of Geological and Mineralogical Specimens at 52s. 6d. 

 and ^5. 5s. Cabinets of Electrical Apparatus at ^6 J 3. 3s. and sS5. 5s. 

 Collections of Shells, Tool Chests, &c. 



ANALYTICAL CHEMICAL APPARATUS. 



Apparatus for every Operation in Chemical Analysis, qualitative and quan- 

 titative, for Assaying by the Muffle, and for Centigrade Testing or rapid 

 Analysis by Graduated Vessels and Prepared Test Liquors. 



GRIFFIN'S PATENT BLAST GAS FURNACE. 



This Apparatus supplies, in the most commodious manner, a white heat, 

 which can be used for the Decomposition of every description of Ore or 

 Mineral, or for the fusion of Refractory Metals in blocks of as much as 

 10 Ibs. weight. An Illustrated Description of this Furnace, post-free for 2d. 



BLOWPIPE APPARATUS, 



Including every requisite for the examination of Minerals and Metallic 

 Substances, arranged in portable Cabinets. 



