Oscar Moeller, Hamburg. W. Niehls, Berlin N. 53 



coloured dials of paper and glass, nickel plated mechanism and silver 

 plated or enamelled insides. Barometers in metal cases. New 

 Patent Compensation Plate Thermometer (metal-index), by which read- 

 ings of the temperature may be taken at a distance, a great advan- 

 tage as compared with mercurial thermometers. Contact thermometers 

 of similar construction with one or two indices which may be adjusted 

 to sound a bell at any desired temperature. And a large Maximum 

 and Minimum Compensation Plate Thermometer. 



Particular attention is drawn to the Pocket Altitude Barometers. 



The great cheapness of these instruments is mainly due to the 

 employment of about 50 machines specially constructed for their ma- 

 nufacture. 



No. 2776. 



W. Niehls, Berlin N., 



160 Schimhauser- Alice. 

 Maker of Meteorological and Physical Instruments. 



Glass Fusion Scale. Registered. For determining the degree 

 of fusibility of different glasses; with directions for using, in case with 

 test rods. Suitable for glass works, chemical and physical laboratories 

 and for teaching purposes etc. 



High Temperature Thermometers, /Jena glass 59 m , indicating 

 to 550 C. Graduation burnt into glass by patent process. This pro- 

 cess not only adds to the permanency of the colour of the division 

 lines but also increases the durability of the thermometers. 



Rod Thermometers with graduation burnt in or first etched 

 and subsequently burnt in, by the above process. 



Thermometers for clinical purposes. Mineral Oil Tester, 

 according to the directions of the Imperial German Standard 

 Assize Commission. 



Breguet's Metallic Thermometer, for class demonstration. 



