REPORT OF THE CHEMIST. 141 
Per cent. 
MEE IR ae ae Sy DU By ee ee ee ar sare asin a ae - 6.31 
SPS MESORUUCD. coo -0 Seeetneen tetas en = acniese ~~ ences eee ee . 90 
Rupee TUAULEL, J. 5 oereR Pree s na niswnaweletcos sos aincneaealede on SPE SS Sane 92.79 
100. 00 
There was present .49 per cent. nitrogen, equivalent to .59 per cent. of 
ammonia, and 6.46 per cent of phosphoric acid, .82 per cent. of soda, 
.46 per cent. of potash. 
SLATE-DUST FERTILIZER. * 
A specimen of slate dust, received from George D. Spencer, Fair Ha- 
vens Vt., contained 4.95 per cent of potash, and nothing else of acknowl- 
edged fertilizing value, and yet, owing to the fine state of subdivision, it 
is possible that this small amount of potash may be slowly available to 
the growing plant; still the commercial value of this fertilizer scarcely 
can exceed one or two dollars per ton. 
COMMERCIAL FERTILIZERS. 
Under this head may be comprised analyses of three samples of sul- 
phate of ammonia, each of which was found to be as represented, and 
fully worth the price for which they were sold. 
Three fertilizers have been examined, viz: 
_1. Loess superphosphate, from Anthony Pirz, Long Island City, N. Y. 
2. Windsor Guano Company phosphate, from J. L. Crouse, vice-presi- 
dent of the company, Washington, D. C. 
3. Superphosphate, received from H. C. Belt, Rockville, Md., said to 
be “ Eureka.” 
Analyses of these are given below: 
2 S : 
a Ba. So soles 
Constituents. Ba , aS 
£ Syst $3 ag 
: Cy hh 
4 i 
: Per cent.| Per cent.| Per cent. 
Soluble uésphorie AG cawe aennm one coma nhl ae actewban = daemauievss Cada < 54 9°69) |) Draco: [/-2-.ueesee 
PEREUCHODRONDHOLG AGO... ow -<06 = -case om aemen= sone wewmeceseccanenns-|-sacuanane iB -75 
SEHHELI OO; PHOSPNOLIG ACIG soe = ode on we coe nencn as wanenencscee snot ues|lesecneeee EPSRC.) |peate= See 
PRUs Meee enreteaamin mio ainl = dw dwn soci sme eencwenn sa cnasanscoeee anGee-4-- Se 57 -14 74 
SU EWROL CME oem ew ce ame a eon setn ace soneie cn den ceens adandncanenenesnessceuee 14 -13 2. 04 
By adopting the scale of prices for the above constituents which has 
been used by T. L. Janes, the commissioner of agriculture for Georgia, 
in estimating the value of those fertilizers sold in that State, and which 
scale of prices appears reasonable, viz., 18 cents per pound for nitrogen, 
123 cents per pound for phosphoric acid, and 8 ceats per pound for pot- 
ash, it will be seen that a ton of 2000 pounds of the above fertilizers 
will be worth as follows: 
Constituents. * | Loess. Windsor. | E.C. Belt. 
SESE nee $24 23 $2 65 | $1 88 
IY oun yd Se EE es es ie ens ee 50 47 7 34 
DE hes 2 2g Et ae re ee at 91 22 118 
VET SPIT OG Gre CT Se 2 ap ae Se » 25 64 3 34 10 40 
