ANALYSES OF SLATES AND SHALES. 
VERMONT. 
Samples A to I, inclusive, are described by T. Nelson Dale in 19th Ann., pt. 3. 
Analyses by W. F. Hillebrand, record Nos. 1567, 1656. Roofing slates of Cambrian 
age. 
A. McCarty quarry, South Poultney. 
B. Unfading green, Eureka quarry, Poultney. 
C. Sea green, Griffith and Nathaniel quarry, South Poultney. 
D. Sea green, Rising and Nelson’s quarry, Pawlet. 
E. Sea green, Brownell quarry, Pawlet. 
F. Black, American Black Slate Company, Benson. 
A B. C. D. E. F. 
SiO Fis osesemvaremacumcacay erieoceaaasednee anus vaieeese 61.63 | 59.27} 62.37] 67.76 | 59.84] 59.70 
AlOsee owewers wseacceeseaede awed volnsedceinaeaadmelcios 16.33 | 18.81 | 15.43] 14.12] 15.02] 16.98 
Ba Ogu axqicwian unwecs gee ose neneoutiocan uamamecuacsa dase 4.10| 112) 1.34 81] 1.23 . 62 
BGO oo iniesciaisiniinis os'sbsetielnals vsGwienaed a sacaca oben Malate 2.71) 6.58) 534] 471] 4.73 4.88 
MEO! sisc.cinaie clad Aaaauee teach aedatedsias vabacuunscemeeen 2.92: 2.21} 3.14| 2.38] 3.41 3.23 
OBO ac cnte tasalives Natecadsmacecatmna tneeaReNen tas eee - 50 42 7 .63 | 2.20 1.27 
Na20 3 se vecennistieae somaaue ce veeaeusesaeecearacuma scent 1.26! 1.88) 1.14] 1.39] 1.12 1.35 
TsO a cys ne ctetsommave soceraineini ema atin reac ota rtentan space 5.54| 3.75) 4.20/ 3.52| 4.48 3.77 
GO: Bt TOO aareicserrs.ararcsioteania aainneeanatsteio’ Dow Aemate amar ets 231 -32 34 -23 41 -30 
H20 above 100° 3. 24 3. 98 3.71 2.98 3. 44 3. 82 
TiOe. - 68 -99 74 eal 174 -79 
P25. -16 11 06 07 09 16 
MNO cecenaatiennGursusacecisuinaslncacs .09 .13 22 -10 34 -16 
BeO} sisiiiatudanausoindatascanieaiolanecor 06 05 07 - 04 09 - 08 
COR ciniae tes eeeeeennoecimeunttededus AL 21 87 - 40 2.98 1.40 
eGo. ccc. sa sacs gacesucss cadens saeees -04 15 06 +22 0 1.18 
ejb 5 sinta eye ia Veto ears ioe as isin SNES Bintcieilenstogs tae none | none| trace | none | trace? - 46 
99.98 | 99.98 | 99.80 | 100.07 | 100.17 | 100.05 
All six contain traces of lithia, of sulphates, and of nickel or cobalt. 
G. Unfading green, Valley Slate Company’s quarry, Poultney. 
H. Mottled, purple and green, Eureka quarry, Poultney. 
I. Purple, 1 mile south of Hydeville, in Castleton. 
Gs H. I. 
RS Oa setae victid eds std We ici ea cae sp aalo nips Sea ne aaa ald a oe mea 59,48 | 60.24] 60.96 
GANS O Boe faiiotae wearerickcteotpeemastenncts chesrserc cio) pe tmeon seth act eseorsste ett eloe aera es 18.22] 18.46] 16.15 
Fe202 1.24 2. 56 5.16 
FeO. 6. 81 5.18 2. 54 
SMEG Ole. siasaisie aussizasesetatvaustsie saiers 2. 50 °2. 33 3.06 
CBO io cdiceectasaceeitienumaes dotascndlaslatladetmasdsaiecietes . 56 . 33 71 
IN AiO g ciivaccacen anwar canon sarang ae Gat acta cae need Soc tearembretaaaebasnntat Renae 1.55) 1.57 1.50 
Keg O soe scapes x vardaralircisaaaianc eines ape eae ener veda ansisne ami semmnGnen aca mans eincedel 3.81 | 4.09 5.01 
TsO abd? rridecceyersosscnescsanarsiaonats cciatevacin pier natetee piaceciadateiat mee aoa weteceni ‘ -18 «17 
H20 above 110°. . 3. 81 3.08 
102 92 - 86 
P2035... alt . 23 
MnO 07 -07 
Bao... 03 -04 
COs... - 08 - 68 
FeSe. -16 none 
Ei cedac trated undet. | undet. 
N, as NHs - 03 -O1 
100.15 | 100.23 
All three contain traces of lithia, nickel, and chlorine, and possibly of zirconia; in G and H traces of 
strontia, but none in I. 
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