CXXVl r 



The minutes of the last meeting were read and approved. 



Dr. Sander gave some account of analyses made by him of sam- 

 ples of the condensed milk manufactured by the Highland Con- 

 densed Milk Company of Illinois, and directed particular atten- 

 tion to the fact that this condensed milk differed from that made 

 in Switzerland, and elsewhere, in that evaporation was stopped 

 earlier in the process of condensation and that no sugar was 

 added, as shown by the following table giving the analyses com- 

 monl}^ accepted of the Ordinary Milk (uncondensed), European 

 Condensed Milk (upon the authority of Eisner), and the High- 

 land Condensed Milk, from an average of ten samples : 



In per cent. Ordinary. European. Highland. 



Fat 3.5 10.98 13.99 



Nitrogen substances 4.0 12.32 11.70 



Sugar of milk • 5.0 16.29 15-53 



Ashes 0.7 2.62 2.20 



Water 86.8 26.61 56.58 



Sugar (added) — 31-18 — 



100.00 100.00 TOO. 00 



Dr. Sander remarked that he had kept samples of the condensed 

 milk in his office for several weeks during the hot weather of July, 

 and it had remained sweet. 



Mr. Engler exhibited and described the construction of a model 

 of a Single Curved Surface with a Helical Directrix, sometimes 

 known as a Developable Helicoid. 



Prof. Trelease exhibited specimens of the Chinese water chest- 

 nut {Trapa bicornis)^ which were offered for sale on one of the 

 streets of St. Louis, and remarked on their structure. 



With them he had obtained a few specimens of a globular dry fruit about 

 \\ inches in diameter, which proved to be the Chinese "lychee," figured 

 by Gaertner (Fruct. et Semin. vol. i., p. 198, pi. 42) as Scytelia chinensis. 

 This was said to be one of the Sapindacece, now known as Nephelium 

 litchi, according to the "Genera Plantarum" of Bentham and Hooker. 

 Each fruit contains a single large seed, surrounded by a fleshy aril, resem- 

 bling raisins in smell and taste in the specimens shown : this constitutes 

 the edible part of the fruit. To it Gaertner applied the name •'■Prutti da- 

 masceni" According to Mott (Fruits of All Countries, p. 9), a similar but 

 smaller fruit is known in China as " longan " or "long yan." 



In connection with these fruits, it was stated that 



an itinerant had been reaping a rich harvest of two-cent pieces from the 



