Bauhaus-Universität Weimar

Titel:
Microscopes and Accessories for the Microscope, Carl Zeiss, Jena, 35th Edition
Person:
Zeiss, Carl
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit18125/112/
109 
latter within a metal casing a Nernst glower and a condensing lens. The lamp 
throws a beam of light obliquely downwards upon the microscope mirror. It 
takes a current of 1.25 ampere and may be employed either with a direct current 
or an alternating current, the glower being selected accordingly. The lamp is 
not self-starting and hence the glower requires, after switching on the current, to 
be rendered incandescent with the aid of a spirit lamp (Tinol burner) or a gas 
flame. For observation in transmitted light the beam of light emitted by the lamp 
should be moderated according to requirement with the aid of one or other of the 
frosted glass plates supplied with the lamp. For dark ground illumination it is 
generally necessary to use the light with its undiminished intensity. 
Full particulars will be found in the Directions (Mikro 277). 
When ordering please state the nature of the available current and its voltage. 
Fig. 53. 
Electric Microscope Lamp (Hand Regulating Arc Lamp), 
(about I Full Size.) 
No. 13.9160. Microscope Arc Lamp. An arc lamp using a small current 
is exceedingly useful for microscopic observations requiring a very intense illumina¬ 
tion, especially for bringing into view very difficult objects with the aid of dark 
ground illumination and for the ultra-microscopic observation of colloid substances. 
Apart from Weule’s self-regulating arc lamp we supply a Hand Regulating Lamp 
(Fig. 53) fitted with a Condenser of great light transmitting power (Micro 
Arc Lamp), which consumes about 2 to 4 amperes and which can be used with 
a direct current as well as with an alternating current. Against the possibility 
No. 
Marks 
Codeword 
13.9160 
Mirco Arc Lamp (Hand Regulating Arc Lamp (with 
condensing lens), using about 4 amperes . . . 
47.- 
Proavitos 
13.9161 
Carbons for direct current, per 100 pairs . . . 
7.— 
Proarchon 
13.9162 
„ „ alternating current, per 100 pairs 
7.- 
Proareis 
13.9165 
Resistance for 110 volts f with flexible cable | . 
12.50 
Proarthri 
13.9166 
„ „ 220 „ 1 and plug connector | . 
18.50 
Proasma
        

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