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Spec 1960 [calculations] Cop Therefore Hornblende

(Spec 1059) [calculations] Therefore Hornblende

I should call this rock intermediate between Feldspar & phonolite Specimen 990

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(Specimen 64) [calculations] (Real angle being 92°.55 87.5) ∴ augite

(Specimen 65) 115 18 [calculations] Therefore Augite Cop

(Specimen 59) [calculations]

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(Saturday)

(Specimen 953) Obtained angle of 55° Therefore Hornblende

(Spec 59) [calculations]

[calculations] Twin crystal of augite Miller ­ copied

(Specimen 1865) 40. [calculations] cop Therefore Epidote Cryst of Epidote is 115°.30'

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Tuesday 17th

(Specimen 140) [calculations]

[calculations] The 116°.30' was gained by omitting one plane taking two brightest Cop

Specimen 2252 Hornblende ∠ 127°15' Cop

Specimen 2273 ∠ 109°. What is this?

[5]

ascertained M. Hornblende [calculations]

[calculations] lath with most care yet wrong

Specimen 938

Angle +55° Cop

& + 125° 15 (strike>bad obser)

another fragment 54.18 (bad Observ)

Specimen (323) black cryst 52.50+ Cop

bis 125°+ 2d fragment

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(All copied on this one page cop)

3256 Bad obser. gave 86° prob. albite

3113 angle 90. twice over ∴ Feldspar within 15' minutes or opposite sides a 3d fragment gave 90°.— no doubt F.}

3830. — ∠ 54° ∴ Hornblende Black glittering rock, quality of F. vy small.

3831 — ∠ 55°30' Hornblende—

I cannot anyhow measure the Feldspar, appear white like albite

3112.—black cryst 55° ∴ Hornblende

2079. well formed jet black fine cryst of Hornblende

(55°30').— many scales of mica, vein of quartz. cryst of albite. angles three. (95°. 95' 20' 94°. 40???)

two maclas however were 7°15' & 6°25'. ∴ albite.— numerous specks of pyrites heavy compact rock coarsely crystallize

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962. Numerous scales of dark how mica. do. glittering cryst of Hornblende (124°30') no grains of quartz.— white feldspar.— three darker specimen. (94°.45'. 94°.25' 85°.18')! vide last specimen

1 960 very numerous large scales of black mica few cryst of Hornblende black (125°) base foliated & granular snow white F. angles 93°.48' 86°.38' 94°.30' and a macla 7°.20' all distinct fragments no quartz albitic

2258 Hornblende 55°/ but few good cryst nearly black, generally in small patches imperfectly crystalise & greenish passes into earthy soft specks appearing like chlorite.— very numerous minute grains of quarts ascertained by B.P. — a main mass of white albite, one angle 93°.20 & macla 7°.6'

995 one angle (poor) 93°.6' (another bad 92°.54') another angle 86°.48' therefore albite (125° Hornblende) the latter thickly scattered in small black brilliant crystals whole mass dark grey granular like syenite: very few scale of dark brown mica: I could see no quartz

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994. appear just same as 995

2653 (felspar not very white V 2882) White foliated almost granular so as to pass into nature of base of porph.— one angle gave 90° and another 85° so that more must be examined

Most numerous small scale of black mica & obscure specks of Hornblende: no quartz no doubt green striated Hornblende from resemblance to following mineral

2607. Hornblende not very abundant cryst 125°: ∴ much black mica in large scales.— white felspar well crystallized but slightly glassy & difficult to obtain good cleavage plain. I obtained following angle 85° 90° 90° 95° 15 (90°.6' 89°42) 87°.51'—

I then obtained following angles 180° 91°15' 98.30' the macla measured more carefully  6°.44'

⸮ Feldspar and albite

Miller says probably Albite

(V. 2887. I think very probably also Feldspar)

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2912 Albite (83.54) (86°30' pretty good) (92°30' poor) (93°18' pretty good) (85°18' poor) Hornblende pale green, not distinctly crystallized but disseminate in small patches, so as to make rock mottled.— crystals of F. many of them elongated & glassy.—

2932. — common coarsely crystall greenstone. I cannot obtain cleavage.—

2882 crystallized whitish mass, not very perfectly granular; some with faintest tinge of red, & rather opake, good cleavage 90°20'.— others more glassy & transparent with following angles 87°.— 0.° 172°.42' 87°.45 Therefore we have a macla of 7°.18.' & the two usual angles of albite — Then the scattered crystals in patches of black brilliant Hornblende 124°30'.— & green do. (as in former specimens) mingled with little fibrous chlorite.—

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2933 irregularly mingled granular crystallized black Hornblende and probably feldspar as well as Albite ∠ (90°33' good) (taking different parts of imago) (91. 40 and 90°) // (&, as before 85. 39 or 87° 2') (86° good) 94° 15' 93°30'—

3080.— brown mica. 2 soft green foliated mineral, intermediate between chlorite & Hornblende sometimes when [illeg] passes crystallize assume appearance of latter with about an equal quantity of Albite two maclas 8° 6' & 7° 9'

2906. well crystallized feldspar with tinge of pale red. (angle, 90° on both sides very good) (90° 14' good.) (89° 40' pretty good) and 75° perhaps mistake of 2 cryst) with very few irregularly scattered minute cryst of black Hornblende.—

3081 Confined crystallized mass. black Hornblende green micaceous mineral allied to that in (3080). & little white feldspar or more probably albite could not obtain cleavage.

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3067) Fine granule cryst mixture of small green crystals of Hornblende, appearing of mica & white probably albite. I only succeeded in one measurement which are poorish it gave 93° 50.

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Specimen (3071) (55°10' & 124.48) Therefore Hornblende, abounding with fine large crystals — — The feldspar I could not measure palate strewn green—

(2975) 86.48' 93.30 ∴ Albite coloured red elongated small

(2896) angles (0. (85.48 93.20) 0) therefore twin double crystals of albite.—

Spec 2408 angles 93°.45' (& 86° poor) (another angle 87°.14' poor) ∴ Albite

Spec 3289.) 1°86°: : 94°.15' = 86°15' 93°.45'} 1 fragment

86° 94° 94° 86°} 2 fragments Therefore albite

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3406) — angle 93° (not particularly good)

(3267) feldspar 90° (Galapagos) angle 90°.30', and again 89°.— no doubt feldspar

3472 — angle poor 77.15 and 104°.30' (latter best?) Compare with the diallage: externally closely resemble it

2902 — (59.17) natural planes fuses readily into black dark enamels swell so [illeg]

⸮ what is it? —

Specimen 3125 crystals of Hornblende cleav 124°.— I could not succeed with the Feldspar

3216: Porph with Albite ∠87°. & some wld appear Hornblende

3292 3292 angle 93°. ∴ Albite no such rock probably mistake for 2292

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(real t of albite 93.30 86.30

Specimen (2603) Scale of mica 60° 146° 59.18° — 60 + 94° copied + = 86.42 (latter best measurement) green palete feldspar albite strained green with black specks of Hornblende??

Specimen 2709 Cop angle 74.° 50' real angle 74.55° Therefore Carb of Lime

Specimen 2680 ∠74°.30 Cop Therefore Carb of Lime

Specimen 2255 4.30: 48°45' : 97° 142°.36 6°.6' 48.48 94°.20' + 141°6' 4°.30'

angles = 44.15 — 48.15: 45.36. 43°.30'

42.42 45.32 46.46 43°.24°

no doubt twin cryst of Augite Cop

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Specimen 2390; cavities lined with green earth,— glass Feldspar cleaving 86.°42' and 92°.40' Therefore Albite Cop

Spec 2757. / 85°.30' (bag)

(Specimen 3841. 3841)— 0.95.50

180 179.35 78.20. — (1.40 bad) — 78. 179°. 35V = 78.55, 103.20, 76.20 101.35 ??

(Prof Miller ∠78.26' 79.15 180.2') Prof Miller has it

Specimen 3895.— 0. 105° therefore Cala Spar.. Cop

(Sp 3455) 50° — 5 — 49°.9' + 135° - +44.9 Cop

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Same main specimen 34565)

122°15' (180) – 79.15 122.15 +137° 43° Therefore Augite (Cop)

3 2378. — red metallic tarnished mineral olivine. Transparent cryst gave angle about 95°.30'.

Chabasce has ∠ of 94°46' – agrees under blowpipe to act as do.­ Cop

3733 angle 90° Feldspar Cop

3736 looks so exactly same did not try Cop

3742. — angle 93°. 20' (mean) — Ascension ejected Volc

Porph gneiss from Rio ∠ 89°18'

another specimen from angler, all under a tree exactly 90. all under a few minutes difference

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Specimen 3247 112 85°

84° 11-92° diff fact.: observ worth nothing

94° 20' pretty good} 1

87.25 poor 93.15 good 87.46 poor 95 poor} 2

93°30' 86° 30 angle of Albite Therefore albite

2757 93° 38' 85° 45'} 1

93° 86 40} 2 Therefore albite