500 



The canker-worm was destructive to apples in Suffolk County, Mas- 

 sachusetts. 



Caterpillars and boll-woruis were observed in the cotton-crop in nu- 

 merous counties in the cotton States, a continuation of the ravages 

 previously reported. 



CHEMICAL MEMORANDA. 



By Ryland T. Brown, Chemist. 



Laboeatory work. — The fiber of a species of aquatic grass, {Sporo- 

 bolvs cryptandrus,) found growing along tlie shore of Lake Erie, was sent 

 to the laboratory by H. C. Beardsley, of Faiuesville, Ohio, to determine 

 its adai)tation to the manufacture of paper. 



A proxiuiate analysis shows the following composition in 100 parts: 



Inorjiauic matter 1,947 



Celluliu, (tibers) , 98.053 



100. 000 



It is therefore rich in the material for the manufacture of paper. 



A si)ecimen of marl from Queen Ann's County, Maryland, presented 

 by Thomas Hill, of Baltimore, Maryland, gave on analysis the following- 

 result: 



Moisture, (determiued at 100° C) 0.2700 



Carbonate of lime 57.0445 



PboKplioiio acid - 0. 7097 



Sesqui-oxides of kon and alumina ' 2. 1 103 



Silk-.a 39.8tt.^.5» 



Magnesia and potash, of each a traoe. 



100. OOOO 



W. A. Hein, New Iberia, Louisiana, asks the analysis of a species of 

 muck which is abundant in that vicinity, and whicii he proposes to 

 use as a fertilizer. In 100 parts, it has the follo\Aiug composition : 



Moisture, (determined at 100° C.) '-..-- 21.300 



Orjiiinio matter - 38.200 



Oxid»8 of iron and alumina 2. 832 



Fliotiphoric acid 0. 678 



Lime , 0.310 



Magnesia 0.388 



Siliceous matter 35.022 



Losb 0.570 



100. 000 



Mr. J. n. Philips, Spring Bluff, Adams County, Wisconsin, presents a 

 sample of shale or rock of which he wi.shes to know the value as a fer- 

 tilizer. On analysis it shows the following composition : 



Water, (determined at 100° C.) 1. "00 



Siliceous matter ^ 43. 110 



Iron and alumina, (oxides) 20. 655 



Lime 5.300 



Magnesia 11.56d 



Soda 3.4-l<> 



Carbonic acid 14.258 



Phosphoric acid and potash, of each .• a trace. 



100. 089 



