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kingdom, in very minute, although perceptible quantities. 
Thus Thallium occurs in the ash or the charcoal from wine 
yeast, in molasses, tobacco, chicory root, &c. If four pounds 
of any of these substances are taken, a quantity of the double 
chloride of Platinum and Thallium is obtained sufficient for 
many experiments. According to my most recent experi- 
ments, Thallium occurs in the dust from the pyrites burners 
as Thallium -iron-alum. I have lately prepared this salt 
directly from the sulphates of Thallium and Iron ; it is the 
most easily soluble of all the Thallium salts ; it possesses the 
pale reddish amethystine colour of ammonia-iron-alum, it 
crystallizes like this salt in large regular octohedra, and 
contains PA atoms of water. Sulphate of Thallium is 
isomorphous with sulphate of Potassium, and the fact of the 
formation of the above double salt is another proof of the close 
relationship between Thallium and the alkaline metals, 
independently of the fact that it almost invariably accom- 
panies Potassium, and not unfrequently both Caesium and 
Rubidium.” 
A Paper was read by J. C. Dyer, Vice-President, entitled 
“ Notes on Spinning Machines : Part 1 ; The Mule Jenny 
who stated that — 
Two distinct principles were embraced in the inventions of 
James Hargreaves and Richard Arkwright, which were 
afterwards combined by Samuel Crompton, to form the 
beautiful power driven machine, called the Mule. Arkwright 
employed the throstle, or throated spindle, with arms or 
“ flyers,” to conduct the threads on bobbins, arranged in 
stationary flames; Hargreaves employed naked spindles 
arranged on a traversing frame or carriage, by which the 
threads wore drawn out (about 5 feet) in horizontal lines, 
whilst being twisted, and were then taken up, or wound, 
on the spindles, to form “cops,” whilst the carriage 
returned to the roller beam for another “stretch.” This 
