Collection:
Juneau—Douglas City Museum
Object ID:
2007.22.062A—JJJ
Accession#:
2007.22
Credit Line:
Transferred from the U.S. Bureau of Land Management.
Object Name:
Bottle, Reagent
Year Range from:
1950
Year Range to:
1996
Description:
Refractive Index Mineral Grains/Standards
A: Box Lid
Red wood rectangular box lid. The back is higher than the front and slopes down to the front. There is a label on the front that reads "ALLEN SET / REFRACTIVE INDEX / STANDARDS / 60 GLASSES & MINERLS (100 MESH) / M—1 / R. P. CARGILLE NEW YORK."
B: Base
Red wooden rectangular base. Five tiered risers each with 12 holes for bottles.
C—JJJ: Bottles
A series of 60 small glass viles with a black plastic top and a paper label, each with a different compound in it. Bottles were not individually labeled.
Used to determine the mineral composition of an ore sample. If the refractive index of a mineral grain being analyzed via the immersion method (see 2007.22.074) fell between that of two known minerals, or mineral grains of a known mineral with a known refractive index could be used for comparison.
A: Box Lid
Red wood rectangular box lid. The back is higher than the front and slopes down to the front. There is a label on the front that reads "ALLEN SET / REFRACTIVE INDEX / STANDARDS / 60 GLASSES & MINERLS (100 MESH) / M—1 / R. P. CARGILLE NEW YORK."
B: Base
Red wooden rectangular base. Five tiered risers each with 12 holes for bottles.
C—JJJ: Bottles
A series of 60 small glass viles with a black plastic top and a paper label, each with a different compound in it. Bottles were not individually labeled.
Used to determine the mineral composition of an ore sample. If the refractive index of a mineral grain being analyzed via the immersion method (see 2007.22.074) fell between that of two known minerals, or mineral grains of a known mineral with a known refractive index could be used for comparison.
Notes:
Used to determine the mineral composition of an ore sample. If the refractive index of a mineral grain being analyzed via the immersion method (see 2007.22.074) fell between that of two known minerals, or mineral grains of a known mineral with a known refractive index could be used for comparison.
Bottles (From l to r, bottom to top):
1.34 Cryolite
1.40 Lithium Fluoride
1.43 Fluorite
1.44 Opal
1.46 Ammonium Alum
1.47 Thaumasite
1.48 Sodalite
1.49 Obsidian
1.50 Pumice
1.51 Mircocline
1.51 Optical Glass
1.52 Optical Glass
1.52 Gypsum
1.53 Optical Glass
1.54 Optical Glass
1.55 Quartz
1.55 Optical Glass
1.56 Optical Glass
1.57 Optical Glass
1.58 Optical Glass
1.58 Beryl
1.59 Anhydrite
1.60 Optical Glass
1.61 Gypsum
1.62 Optical Glass
1.63 Tourmaline
1.64 Barite
1.65 Optical Glass
1.66 Calcite
1.67 Spodumene
1.68 Olivine
1.69 Optical Glass
1.70 Augite
1.71 Wilemite
1.72 Optical Glass
1.72 Rhodonite
1.72 Cyanote
1.73 Basaltic Hornblende
1.74 Periclase
1.75 Optical Glass
1.75 Grossularite
1.76 Optical Glass
1.77 Corundum
1.78 Almandite
1.80 Monazite
1.81 Spessartite
1.83 Rhondochrosite
1.85 Optical Glass
1.86 Siderite
1.88 Melachite
1.90 Andradite
1.92 Scheelite
1.93 Titanite
1.97 Zircon
2.00 Cassiterite
2.01 Zincite
2.40 Sphalerite
Unknown For Test 59—A
Unknown For Test 60
Bottles (From l to r, bottom to top):
1.34 Cryolite
1.40 Lithium Fluoride
1.43 Fluorite
1.44 Opal
1.46 Ammonium Alum
1.47 Thaumasite
1.48 Sodalite
1.49 Obsidian
1.50 Pumice
1.51 Mircocline
1.51 Optical Glass
1.52 Optical Glass
1.52 Gypsum
1.53 Optical Glass
1.54 Optical Glass
1.55 Quartz
1.55 Optical Glass
1.56 Optical Glass
1.57 Optical Glass
1.58 Optical Glass
1.58 Beryl
1.59 Anhydrite
1.60 Optical Glass
1.61 Gypsum
1.62 Optical Glass
1.63 Tourmaline
1.64 Barite
1.65 Optical Glass
1.66 Calcite
1.67 Spodumene
1.68 Olivine
1.69 Optical Glass
1.70 Augite
1.71 Wilemite
1.72 Optical Glass
1.72 Rhodonite
1.72 Cyanote
1.73 Basaltic Hornblende
1.74 Periclase
1.75 Optical Glass
1.75 Grossularite
1.76 Optical Glass
1.77 Corundum
1.78 Almandite
1.80 Monazite
1.81 Spessartite
1.83 Rhondochrosite
1.85 Optical Glass
1.86 Siderite
1.88 Melachite
1.90 Andradite
1.92 Scheelite
1.93 Titanite
1.97 Zircon
2.00 Cassiterite
2.01 Zincite
2.40 Sphalerite
Unknown For Test 59—A
Unknown For Test 60
Search Terms:
T&E
JMIC
Assaying
Mining
JMIC
Assaying
Mining
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2007.22.062A-JJJ
2007.22.062A-JJJ