372 



Phosplioric acid ^ Trace. 



Maguesja .*. Trace. 



Potassa Trace. 



100. 000 



No. II. — Green-sand marl. 



Moisture , 4.025 



Lime 7.2G0 



Carbonic acid .'').452 



Iron aud alninina 3.950 



Phosphoric. acid ..',..'. 0.2.00 



Alkalies 0. 7.00 



Silica .» 78.303 



Magnesia Trace. 



100.000 



A specimen of lime marl (Calcareous tufa) from Cliarles G. Thomas, 

 San Jose, Santa Clara County, California, on analysis gives the follow- 

 ing results : 



Moisture 1.500 



Carbonate of lime 58. 360 



Iron and alumina 7. 495 



Alkalies 0. 250 



Phosphoric acid Trace. 



Silica , 32.910 



* , 100. 000 



A specimen of gypsiferous marl from D. E. Coon, Selma, Alabama, is 

 composed of^— 



Calcium sulphate, (gypsum) 22.355 



Silica and alumina a 60. 205 



Moisture 17.440 



100. 000 



A commercial fertilizer, under the name of '-Clark's ammoniated 

 bone," manufactured in Philadelphia, gives on analysis the following 

 results : 



Moisture, (determined at 100^ C.) 6.2000 



Organic matter 37.6500 



Soluble phosphoric acid 8. 6670 



Insoluble phosphoric acid 8. 0787 



Lime 19.2696 



Sulphuric acid 4.9648 



Alkalies 0.5000 



Silica and other insoluble substances 14. 66^ 



100. 0000 



Hon. W. Ilunter, Second Assistant Secretary of State, sends to tlie 

 Department of Agriculture a dispatch (Eo. 61) from the United States 

 vice-consul at El Paso del Norte, Mexico, with the specimens of alkali 

 described in the dispatch. We ajDpend an extract from the communica- 

 tion of Mr. Pierson, the vice-consul, which gives a clear idea of the loca- 

 tion and extent of this singular deposit: 



* * * There is a large basin, or quantity of low, flat, and damp land, contain- 

 ing .about 5,000 acres, situated iu the state of Chihuahua, one hundred and lifty miles 

 distant and south^Yard from this city, in parallel 31, near L:ilce Guzman, wliich pro- 

 duces these pearls ; for the specuacus clearly resemble the pearls made from tlic black 



