G. A. Schultze, Berlin S.O. 93 



framing, which may be made of cast iron or yellow metal and thus 

 ensures great durability. The mercury bulbs of these thermometers are 

 protected from bursting by the following device, which has been adopted 

 almost exclusively in all these thermometers. It consists in the bulb of 

 the capillary tube being protected by a closed iron tube which terminates 

 in the connecting flange or nut. The source of heat (steam, boiling water 

 etc.) is thus prevented from touching the glass bulb directly. The iron 

 tube is filled with mercury which completely surrounds the bulb, thus 

 communicating to the latter the external temperature with such rapidity 

 that the indications of such a thermometer are quite as rapid as those 

 of a thermometer with uncovered bulb. This arrangement has proved 

 to be the most perfect protectbr of the mercury bulb, and on this 

 account the town council of the City of Berlin employ these 

 thermometers exclusively. 



The special advantages of these thermometers have quickly gained 

 a large market for them. The firm counts among its regular customers, 

 beside the town council of Berlin, numerous municipal autorities 

 and important establishments, as may be seen from the references of 

 gas works, breweries, distilleries, sugar refineries, chemical 

 works etc. 



The firm has acquired the sole right of manufacture within 

 Germany of patent No. 59861, Schmidt's self-acting steam throttling 

 apparatus and No. 40295, Moennich's distance thermometer, 

 and besides possesses an original patent for an apparatus for auto- 

 matic registration of the specific gravity of liquids, which is par- 

 ticularly valuable for the purposes of sugar works. 



In 1888 and 1889 the firm received from the Imperial Assize 

 Commission an extensive order for the supply of Standard Thermo - 

 alcoholometers for the German Customs. 



