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a ber clerite of potassium with four atoms of handler i Chiante of potash ;-Sulphate of magdi Subule a nickel and potash ;-86: Chromate

P a rimad fe of silver;-89: Pyrophosphate of

Hoe weisserisi vere priste medio prion making an oblique angle

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TA** - Neutral phosphate of ammonia (2N H‘O,

Pallur raufe of ammonia;-96—100: Ordinary
A N HO POM **HO) or arseniate of soda;-

hare ar pute of social and ammonia;—103, 105: * **** kwiato: 105: Phosphate or arseniate of

-- ; Tertaris achi-110; Acetate of copper ;-111:

Protosulphate of iron or cobalt;-112: Acetate of zinc;-113: Acetate
of soda ;—114: Carbonate of soda with ten atoms of water ;-115: Hy-
drated ferrocyanide of sodium;—116: Hydrated carbonate of magnesia.

c. One-and-two-membered System. Fig. 117–119.
117: Oxalic acid ;-118: Chromate of soda ;-119: Sulphate of soda.
5. Mitscherlich's System. Fig. 120: Hyposulphite of lime.

6. One-and-one-membered or Doubly Oblique Prismatic System. Fig. 121-130.

121–123: Sulphate of copper ;-124, 125: Axinite;—126: Gallic acid;—127: Succinate of ammonia ;—128: Succinate of soda ;—129: Boracic acid ;-130: Alkargen.

7. Three-and-one-membered System.
a. Six-membered or Hexagonal System. Fig. 131–140.

131: Quartz;—132, 135: Sapphire ;–133: Hyposulphate of strontia; -134, 136: Emerald ;—137–140: Calcspar.

b. Three-and-three-membered or Rhombohedral System.
a. Forms derived from an obtuse rhombohedron. Fig. 141-150.

141—143 and 145—150: Calcspar;—144: Neutral hyposulphate of lead.

B. Forms derived from an acute rhombohedron. Fig. 151–160.

151, 153, 155, 156 and 157: Specular iron;-152, 154: Calcspar;158: Sesqui-oxide of chromium ;-159: Red silver ore;-160: Cinnabar.

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PLATE III.

Schemes of Chemical Decomposition. Decomposed compounds are indicated by dotted lines; newly formed compounds, by full lines.

Plate IV.

Apparatus.
Electro-chemical Apparatus and Processes. App. 1–33.
25: Daniell's Constant Battery.
26: Grove's Battery.
27: Trough or Cell Apparatus.
28 and 29: Faraday's Voltameter.
31 and 32: Faraday's Battery.

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1 1.0059 | 1.008 1.007 || 26 1.1806 | 1.220 1.215 || 51 | 1.4286 | 1.546 1.531 11.0119 1:015 1.014 || 27 | 1.1888 1.230 1.225 52 | 1:4407 1:563 | 1.546

1.01801.022 | 1.020 || 28 1•1972 1.241 1.235 53 | 1.4530 1.580 1.562 | 1.0241 1.029 1.028 | 29 1.2057 1.252 | 1.245 54 | 1.4655 1.598 1.578

1.0303 | 1.036 1.034 || 30 | 1.2143 1.263 1.256 55 1:4783 | 1.616 1.596 11.0366 1.043 1.041 || 31 | 1.2230 1.274 | 1.267 26 1.49121.634 1.615

1.0429 | 1.051 1.049 | 32 1.2319 1.285 1.278 57 | 1.50441.653 1.634

1.0494 1.059 1.057 || 33 | 1.2409 | 1.296 | 1.289 11.5179 1.6721.653 | 1.0559 1.067 | 1.064 34 1•2500 | 1.308 1.300 59 | 1:5315 1.691 1.671 10 1.0625 1.075 1.072 35 | 1•2593 1:320 11.312 60 1.5454 | 1.711 1.690 11 1.0692 1.083 1.080 36 | 1.2687 | 1.332 1.324 61 | 1.5596 / 1.732 1.709 12 1.0759 1.091 1.088 | 1.2782 1.345 1.337

1.57411.753 1.729 13 | 1.0828 1.099 1.096 1.2879 1.358 1.349 63 1.58881.775 1.750 14 | 1.0897 1.107 | 1.104 39 1.2977 1.371 1.361 64 | 1.6038 1.797 1.771

11.116 11.113 40 1:3077 | 1.384 1.375 || 65 1.61901.819 1.793 16 1.1039 1.125 | 1.121 1.3178 | 1.397 | 1:388 | 66 | 1.6346 1.842 | 1.815

11.1111 l.134 11•130 42 1.3281 | 1.410 | 1.401 || 67 | 1.6505 / 1.866 1.839 18 1.1184 1.145 | 1.138

1.3386 1.424 | 1.414 || 68 | 1.6667 | 1.891 1.864 19 1.1258 1.152 1•147 44 1•3492 | 1:438 1.428 || 69 1.6832 | 1.916 1.885 20 1.1333 1.161 1.157 45 1.3600 | 1.453 1.442 || 70 | 1.7000 | 1.942 | 1.909 21 1.1409 1.170 1.166 46 | 1.3710 | 1.468 | 1.456 || 71

1.968 1.935 1.1486 1:180 1.176 47 | 1.3821 | 1:483 1.470 ||

1.995 1.960 1.1565 | 1•190 1.183 48 | 1.3934 1:498 1.485

2.023
1.1644 | 1.200 1.195
1.4050 1.514 1.500 74

2.052
1.1724 1.210 1.205 50 | 1.4167 1.530 1.515 ||

2.081

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The scales of Beck, Cartier, b, and Beaumé b, are taken from Graham's Lehrbuch, I, 158; those of Cartier a and Beaumé a, in which the specific gravity of water at 12.5° C. is assumed = 1.000, and likewise the scale of Gay-Lussac's Alcoholometer, are from Maroseau's Memoir. (J. Pharm. 16, 482.)

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