186 A. Bigelow on Mounds on the Tensaw River. 
McCulloh gives 18 per cent. as the proportional amount of cane 
sugar which he obtained by an analysis of the ripe cane juice, 
but remarks that it is probable that 21 per cent., as obtained by 
Péligot and Casaseca, may be the usual or average proportion, 
since his analysis was made of a particular and unfavorable 
specimen. ; 
He gives the following as the result of his comparative analysts - 
of the three varieties of cane : 
Tahiti Creole. Ribbon. 
Water, - - 68-20 68:76 TAS 
Solid matter, - 31:80 31:24 28:55 
100-00 100-00 100-00 
The proportional yield of sugar from the same he rates Ie 
spectively at 67°884, 62-918 and 63-68. 
In using the saccharimeter of M. Soleil, (or indeed any de- 
pending on polarization,) some difficulty may be experienced in 
properly decolorizing the liquor, which must be quite clear and 
transparent in order to admit of accurate observation. G@ 
_ bone-black at times is very essential. But when once in proper 
order, there can be no doubt as to the general accuracy of its 
> saccharimetric determinations. _ 
The programme of a prize offered by the Société d’Encour 
agement called for a process which should determine, within i100 
per cent., the richness of saccharine substances. The process of 
M. Soleil is much more exact.” 
ae 
Art. XXI.—Observations on some Mounds on the Tensaw 
River; by A. Bigztow, Wesleyan Institute, Newark, N. J. 
of marsh and swamp land. Much of it is impassable ; some of it 
quakes and sinks beneath the tread, and is covered with tall grass 
r 
