Determination of the Atomic Weight of Cadmium and the Preparation of Certain of Its Sub-Compounds

by Harry C. Jones

Determination of
The Atomic Weight
of Cadmium
and
The Preparation of Certain
Of Its Sub-Compounds.

Dissertation,

Presented to
The Board of University Studies
of The Johns Hopkins University,

For The Degree of
Doctor of Philosophy,

By
Harry C. Jones

1892.

Contents.

Page
Determination of the Atomic Weight of Cadmium	[ 1]
Introduction and Historical Statement	[ 2]
Preparation of Pure Cadmium	[22]
The Preparation of Pure Nitric Acid	[28]
The Arrangement of Crucibles	[30]
The Mode of Procedure	[32]
The Weighing	[37]
Taring the Crucibles	[40]
The Results	[42]
Objections to the Method	[45]
Advantages of the Method	[48]
The Oxalate Method	[50]
Preparation of Pure Oxalic Acid	[51]
Preparation of Cadmium Oxalate	[52]
Mode of Procedure	[53]
The Drying and Weighing of the Oxalate	[55]
The Results	[58]
Advantages of the Method	[60]
Disadvantages of the Method	[61]
Preparation of Certain Sub-compounds of Cadmium	[63]
Historical	[64]
The Preparation of Cd₄Cl₇	[66]
The Preparation of Cd₄Br₇	[78]
The Preparation of Cd₁₂I₂₃	[82]
The Preparation of Cadmium Hydroxide and Oxide	[82]
Notes on Crystals of Metallic Cadmium	[97]
The Cohesion Phenomena of Cadmium	[103]
Biographical Sketch	[106]

Acknowledgment.

It affords me great pleasure to express my sincere thanks to Professor Remsen for his instruction and personal supervision during my entire connection with the University; to Dr. Morse, under whose immediate guidance the work described in this dissertation was completed; to Dr. Renouf for valuable assistance in qualitative chemistry and to Dr. Williams, with whom the branches of mineralogy and geology were followed as subordinate subjects.