Megadiascope. 1231 



Testimonials. 



TJ n t e r - B a r m e n, 25" 1 May, 1906. 

 I beg to inform you that I am satisfied with the Megadiascope supplied. 



Direction of the Royal Real Gymnasium, Barmen-Elberfeld. 



Duisburg-Meiderich. 



The Megadiascope has fulfilled its purpose completely at a school lecture. 



H. Hermanni. 



Duisburg-Meiderich (Lower Khine), 10 th March, 1907. 



It is with pleasure that I am able to confirm that we are completely satisfied with the efficiency 

 i if the Megadiascope. It has yielded excellent services in connection with a number of lantern lectures. 



Prof. Hermanni, Eeal Gymnasium. 



Complete Price Lists relating to the following sent if desired: 



S Darkening Devices, worked by hand or Electric Motor, for lecture theatres, photographic dark rooms, etc. 

 Scientific Diapositives in connection with Astronomy, Meteorology, Physical Geography and Physics. 



N 



Scientific Diapositives relating to Zoology and Botany. 

 Microscopic Preparations relating to Zoology and Botany. 



Microscopical Preparations relating to Viticulture, Zymology, Dairy Farming Industry, and of Provisions, 

 tjj Starch, Flour, Roots, Fruits, Condiments, also of Adulterated Food-stuffs. 



<i Microscopical Preparations of Wool, Silk, Textile Fibres, Paper. 



Microscopical Preparations of pharmocognostic, pathological Articles, and of tinged Preparations. 



Physical Apparatus which are set up in front of the Megadiascope or on the optical bench of the same, 

 * from all branches of ph\ sics. 



If desired, we supply samples of plates of Butterflies, Beetles, etc. The projection of alcohol 

 preparations, etc., which are placed outside The apparatus, can also be arranged for. Price on application. 



\Ve cany a special price list relating to Projection Lanterns for Electric Light, Lime Light, Thorium, 

 Nernst and Spirit Glow Light, Acetylene and Paraffin Light, which we shall be glad to submit on application. 



