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NEW-YORK MICROSCOPICAL SOCIETY. 



23 



way every dip is traced upon the level surface. The minute 

 motile masses appear to the eye as if endowed with independent 

 will. Now they are spinning like a top with only the tips visi- 

 ble, and again writhing like a serpent at full length. Like 

 caged animals, they run from end to end of the imprisoning 

 sheath, and sometimes roll over and over each other, like boys 

 playing a game of leap-frog. The sheath is like the segment of 

 a joint-rush, Avith a septum at each end, but having transparent 

 walls. 



In Orange-Flower Water we find living spirilla that are like- 



FiG. 3.— From Sulphate of Strychnia. 



wise motile at the proper season. When death overtakes them 

 they look like Koch's Comma bacilli. 



In Cinnamon-Water only bacterial forms have yet been seen, 

 and these evidently decompose the essential oil. As they 

 increase the water weakens, and cinnamonic acid crystals 

 appear. 



In Sulpho-Cyanate of Potassium (Fig. 4), Carbonate of 

 Barium and Phosphate of Sodium organisms containing Chloro- 



