Y. MANUFACTURES. 657 



2664. Description and drawing of an Apparatus for the De- 

 termination of Sulphur (see the accompanying treatise : 

 " Aphorisraen iiber Steinkohlen von Dr. E. Muck.") 



Bcrggewerkschaftskasse., Bochuni, Rhenish Prussia. 



2665. Reich's Apparatus for estimating Sulphuric 

 Acid. Royal Mining Academy, Freiberg, Saxony. 



2661. Collapsing Aspirator, of vulcanised rubber, for 

 rapid gas analysis. Arranged to measure the gas to be examined 

 and to contain the absorbent. On agitation, the gas and absorbent 

 are brought into contact. Used by H.M. Inspectors of Alkali 

 Works. Alfred E. Fletcher. 



2566. WInkler's Apparatus for gas analysis. 



Franz Hugershoff, Leipzig. 



One is intended for relatively small quantities of gases, carbonic acid, &c. 

 Its advantage consists in the considerably narrowed part of the measuring 

 tube above the lower three-way stop-cock, whereby finer divisions are 

 rendered possible. 



The other is constructed with a second three-way stop- cock, in the upper 

 part of the measuring tube, which allows for the easy connexion with any 

 other apparatus. 



2663. Winkler's Apparatus for technico-chemical Gas 

 Analysis. Royal Mining Academy, Freiberg, Saxony. 



2736. Max Xiiebig's Apparatus for determining, for tech- 

 nical purposes, the quantity of oxygen and carbonic acid con- 

 tained in various gaseous mixtures. 



Rhenania Alkali Works, Stolbcrg, near Aix-la- Chapelle. 



A description of this apparatus will be found in Ding. Polyt. Journ., 

 Jan. 1873, of which copies may be had. 



2597. Dittrich's Apparatus for the Volumetric Determi- 

 nation of Gases, accompanied by a printed description, together 

 with a drawing and 5 tables. J. H. Stickler, Breslati*. 



This apparatus may be used for scientific as well as technical determina- 

 tions of the carbonic acid contained in chalk, bone charcoal, &c., and is 

 extensively used in the sugar refineries of Germany and Russia. 



2520. Fixed appliance for the analysis of gases with three 

 reagents. M. Orsat, Paris.. 



2521. Fixed appliance for the analysis of gases with two-. 

 reagents. M. Orsat, Paris*. 



2522. Portable Appliance for the analysis of gases, giving 

 the quantity of gases, giving the quantity of the hydrogen and its 

 carburets. M. Orsat, Paris. 



40075. T t 



