» Agricultural Chemistry. 123 
that any carbonie acid which is reduced to carbonic oxyd, and given off 
as such, is so much Joss or waste! We may avoid this unwelcome con- 
clusion by the supposition that the carbonic oxyd and carburet of hydro- 
gen are products of the decomposition of some of the vegetable matter 
coetaneous with vegetable assimilation, but no part of that process itself. 
This is the more robable, since it cannot reasonably be supposed that 
carbonic acid supplied to the foliage is resolved into oxygen and carbonic 
oxyd and both set free,—which seems to be the alternative, 
2. Content of Starch in various Seeds.—Dracenvorrr, applying the 
method already noticed, (p. 116) for estimating starch, found the follow- 
ing percentages, which are interesting, either as serving to compare the 
results of his method with those obtained by others, or on account of 
including some seeds of which hitherto no analyses have been attempted. 
Dragendorff finds that in the seeds of colza and mustard the starch does 
orm 
lose Stéirke of Schleiden). In the seeds of the Leguminose, Dragendorff 
Supposes a new and undescribed carbohydrate to exist, which has been 
confounded with starch hitherto, but which, unlike starch, is soluble in 
potash solution, 
Cellulose, cork, 
: by treat- aticle, Henne 
|Loss by drying./ment with alco- Starch mucilage an 
rel matin 
hy, 13°2 Bob = 86 
: heat flour, .......... 158 68-7 2-9 
glia heise ai 11-0 59-7 61 
Bad eet oseedenesee] IEG 466 20-4 
Timore gtr 115 575 7-5 
eee teehee eens ess} 13° 45°0 12°5 
“00th ne gg) EERE 13:3 61-7 79 
Beng ga he ta wes 0 873 28°56 
wad Oy yenag SE ee 16°7 33°0 2 
vee wich, J 108 18:4 
px eed, encain 76 23-4 22°9 
ss tad aapg 85 99 30°5 
senha, ee aS 58 86 oN 
Teltow tornips,*.... "|! “|dry subet 98 10-4 
Otatoes, rie eee ae dry substance 625 59 
8. W. J. 
n the heaths 
8. Peat-sandstone—According to Dr Meyn there occurs i 
of Hannover a kind of suet part which consists of sand cemented by 
me though on account of its color it is generally thought to be either 
da or iron-sandstone. It is formed by the evaporation of bog-water— 
low * nearly pure quartz sand. T ains of sand first acquire a yel- 
» then a brown, and finally a dark brown or black color. When the 
vt Solution evaporates, the peat is left in a form no longer soluble in 
wnt, It gradually fills up the interstices of the sand and makes an im- 
Wharable Mass, possessing a good degree ardness and tenacity. 
acid. ; this peat sandstone is placed in ammonia a dark solution of humie 
Jour po ottined, and nothing but white sand remains—. 
: 1862, p. 844. 
* A sweet and mealy turnip grown on light soils for table use. 
s 
8. W. J. 
