Gr.-duc. Standardizing Institute for Glass Instruments, Ilmenau (Thur.). 155 



Part of the graduated flasks, Gay-Lussac's burettes and a few 

 of Mohr's burettes are backed by a white enamel stripe with dark 

 middle line, by Schellbach's process. Viewed through the meniscus 

 formed by the liquid this dark middle line appears deeply incised and 

 thus, especially with the aid of a mirror, as in the case of the burette 

 shown in fig. 2, a very exact reading may be taken. The same result 

 is attained by double graduation. 



3. Part of Pflueger's Mercury Air- 

 pump for physiological purposes (analysis 

 of blood-gas), fig. 3. 



4. Gas Washing Bottle, with inlet 

 funnel acting also as a safety tube, fig. 4. 



5. Molinari's Apparatus for milk-fat 

 analysis, fig. 5. 



6. Capronica's Apparatus for estimat- 

 ing nitrogen in urine (Ureometer), 

 fig. 6. 



7. Soxhleth's Fat Extraction Appa- 

 ratus, fig. 7. 



8. Foerster's Fat Extraction Appa- 

 ratus, fig. 8. 



9. Various other appliances and one 

 set of Boiling Beakers. 



10. A set of Incandescent Lamps for 

 demonstration and decoration. 



Pig. 7. 



V. Franz Schilling, Gehlberg (Thuringia). 



Glass Works: Glass Hollow-ware and Glass Instruments. 

 Exhibits : 



1. Graduated Appliances for Analytical Measurements: Bu- 

 rettes, Pipettes, SchifTs Burettes, Cylindrical Graduated Measures, 

 Graduated Flasks. 



2. Apparatus for Gas-analysis : Appliances for determination 

 of carbonic acid, Alkalimeters, Bunte's Burettes (Jueptner's modi- 

 fication), Winkler's Gas-burettes (Hempel's modification) and Hempel's 

 Gas-pipettes. 



