226 TWENTY-FIFTH ANNIVERSARY REPORT. 
was noticed that the amount of water-soluble arsenic grew less 
each year after the amendment of the law. 
We append the analysis of several special materials sold as in- 
secticides. 
ARSENOID. 
Total arsenic, equivalent to arsenious oxide..............0- 58.82 per ct. 
Water-soluble arsenic, equivalent to arsenious oxide......... 2.94 per ct. 
Copper, equivalent to copper oxide..........:02.sssessee sss. 302702 Den ef. 
IMIGISEURE 4,” <..oe ocresiceeicares Missa ae Mietleieiece tle Sore iese ane eee I.Q1 per ct. 
BLack DEATH 
VAFSEMIOUS Oxide!) .ceceS) bake peas Cee ee ee ene 0.79 per ct. 
Copper: Oxide: 25s Ss), Sa ce Sa ae ee ee Ce 0.41 per ct. 
sulphate of lime Ceypsumi)’; 2. . 5.02 Sock ce Seen eee 45.34 per ct. 
Magnesiam oxide (i022 he tac fea cee aioe ee ee eee 3.98 per ct. 
Iron and aluminum oxides.......... rollefelietsta abe wiate OeerieeeIA oe ae 3.02 per ct. 
SHCA sesan anu eee oe a ee ee Mik beh aoe 5-42 per ct. 
oss: On ignition a28< oe a ates Shee ee ee coe 28.91 per ct. 
Moistutie> soe. don ce cets oe eet een Se Se eee 9.78 per ct. 
Buc DerEaTH. 
ZANC-OXIGE” 665, bie, oarSicc ets, cates ea en een es pee ee 86.80 per ct. 
Tron" oxide “so: i. pasts 22 e Secs ee ceo nee 5.20 per ct. 
Wead “Oxide! . 6.025 dese ce eRe ei eee oe Ce EEe 2.01 per ct. 
SHiGay at oi aise s ecaid SRR eee OE ee ee eee 2.96 per ct. 
Losson | ignition |. ic: Soieecctaow ce ake Oe eee eee 2.43 per ct. 
Phosphoric. (acid) 22 cae secre S Gee eae eee es ee Eee 0.03 per ct. 
INIERO SEM Ws. Gee ee hin eStart 0.04 per ct. 
1510) 1s) s ea RSI Rate cries er it HA Ie ES OIC O MO ao Ea OuidS FES 0.00 per ct. 
Some claims are made for this material as a fertilizer but the 
claims are not supported by the analysis. 
ENcLIsH Buc COMPOUND. 
Arsenious oxide soxi)ivanie cnt eas traorcn ners born oote nes isa ee 1.46 per ct. 
Copper: joxide 45120 Pee ees eee ee Ee ee 0.60 per ct. 
HaAmmMonp’s StuGc SuHor. 
Salphateton slimes (evipsunw)e- se eee eeeeeeeeeeraie 74.72 per ct. 
A ESenIOUS, ..ORIdE: Coan crn eeh sone ee eee eee ao oe 1.04 per ct. 
Gopper’ Oxider. i eanenae Manse ore ahs bale ROM rete eer ae OS S5ORpermce 
Irons aluminium) siliconmoxidesssctce meas ee eeiee acai ae 6.92 per ct. 
IMIOISHITE » oe 5) Se ea EAE ee Oe Rec oe 10.88 per ct. 
Arsenious, Oxideo. sc. SASiky sacs ce ete Ree ee ace aie 4.85 per ct. 
Copper »oxide.<.oh5 Si); ee ae oe ee eae ee 12.68 per ct. 
This contains also large amounts of carbonate and hydrate of lime. ° 
ee ee SS ae ee ee eee 
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