88 



ANALYSIS OF CUBA TOBACCO SOIL. 



The following analysis was published in Bulletin No 19 of the Ex- 

 periment Station at Lake City, Florida, 1892. 



The soil was taken from a Tobacco field in Cuba. The analysis was 

 made by Dr. J. J. Earle, Prof, of Chemistry in Agricultural and M e- 

 chanical CoUege. 



Per Cent. 



Moisture at 110° ... 14 20 



Organic matter ... 12 30 



Sand and insoluble matter ... 30 . 32 



Carbonic acid (CO 2) ... 4.20 



Sulphuric acid (SO 3) ... .12 



Oxideof Iron (Per O3) ... 29.40 



Oxide of Lime (Ca 0) ... 7.60 



Oxide of Magnesia (Mg 0) ... .17 



Phosphoric acid (P^ O5) ... 1.60 



Potash (K 2 0) ... .16 



Soda(No2 0) ... .084 



100.154 



Nitrogen to ... .32 



Ammonia ... .39 



The Sulphuric acid is combined with the lime to form sulphate of 

 lime (gypsum). The remainder of the lime is combined with the car- 

 bonic acid to form carbonate of lime, and with the phosphoric acid to 

 form phosphate of lime. 



FERNS : SYNOPTICAL LIST— LI. 



Synoptical List, ivith descriptions, of the Ferns and Fern-Alliis of Ja- 

 maica. By G. S. Jenman, Superintendent Botanical Garden, 

 Demerara. 



15. Acrostichxm muscosum, Swartz. — Rootstock stout erect, very 

 densely clothed with long linear acuminate, reddish -brown slender scales ; 

 stipites tufted, strong, 3-8 in. 1., densely clothed with two kinds of 

 bright rather tawny scales, one small and appr eased, the other large, 

 loose and spreading ; fronds erect, lanceolate-oblong, J - 1 ft 1. 1^ - 2J 

 in. w., rounded at the apex, the base cuneate or nearly rounded, the 

 margins often repand and uneven, coriaceous, dark green beneath the 

 vestiture, both surfaces equally scaly, the scales generally diffused but 

 not very dense, those of the upper side pale and more appressed, ulti- 

 mately deciduous, beneath tawny, ciliate-edged, most plentiful along 

 the costa and edges ; veins obscure, } - 1 li. apart, forked ; fertile fronds 

 much narrower and on longer stipites. — PI. Fil. t. 126. 



Common on the branches of trees in damp forests at 5,000 - 6,000 ft. 

 alt ; well distinguished by the upright rootstock, tufted stipites with 

 abundant large spreading scales, and erect round-ended fronds. It has 

 similar pale bleached scales to lepidotum on the upper surface, which 

 also becomes naked in time, though as it grows in more sheltered situa- 

 tions not so quickly or completely as in that species. The forms from 



