542 SEC. 13. CHEMISTRY. 



the raised reservoir for re-use. It will be observed that, by the arrangement 

 described, the washed air is forced, not aspirated, through the shade, and the 

 pressure being thus the greater within the vessel, the danger of leakage of 

 unwashed air from without inwards is lessened. In 1857 twelve sets of such 

 apparatus were employed, in 1858 a larger number, some with larger lute- 

 vessels and shades, in 1859 six, and in 1860 also six. The whole were arranged 

 side by side in the open air, on stands of brickwork, as indicated. 



APPARATUS, DIAGRAMS, &c., ILLUSTRATING THE 

 CHEMISTRY OF THE GRAPE VINE. 



2745. Model of Apparatus, designed to impregnate divers 

 fluids, e.g., must, wort, &c., with air, before fermentation. 



2746. Diagram, exhibiting the results of analysis of must, 

 grapes, and trial-manurings, 10 tables. 



To render the proportions of the various substances more conspicuous, 

 their quantities are represented by curves. 



2747. Grape-growing Map of Tyrol, with results of 

 analysis of Tyrolean wines at the station. 



2748. Grape-growing Map of Portugal, with results of 

 chemical analysis of Portuguese wines. 



2749. Results of Wine Analysis, with specimens of 

 chemicals. 



2750. Wine Ashes, prepared by means of electricity, by Dr. 

 Roesler. 



2751. Apparatus for Calcination, after a design by Dr. 

 Roesler. 



2752. Apparatus for Wine Analysis, in box. 



2753. Apparatus for studying the Influence of Elec- 

 tricity upon Wine. 



2754. Cheap Electric Battery, adapted for electrolyticai 

 experiments. 



2755. Pneumatic Pump, with arrangement by which the sap 

 of plants can be extracted, devoid of air, for studying the influence 

 of oxygen upon fermentation. 



2756. Apparatus for the Filtration of Fruit-saps, with' 

 out oxygen. 



2757. Diagram, showing the results of water analysis, with 

 special reference to apparatus for determining nitric acid. 



2758. Diagrams (5), illustrating apparatus employed in ex- 



Eeriments on the growth and respiration of grape vines and 

 :uit. 



