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POPULAR SCIENCE REVIEW. 
of tlie editors), the Edinburgh and North British Reviews, the Transactions 
of the British Association, the Library of Useful Knowledge, have all been 
onriched by numerous products of his pen, bearing upon almost every depart- 
ment of physical science. His separate works were : — A Treatise on New 
Philosophical Instruments for Vmlous Purposes in the Arts and Sciences, with 
Experiments on Light and Colours, 1813; A Treatise on the Kaleidoscope, 
1819; Notes to Robinson's System of Mechanical Philosophy, 1822; Letters 
and Life of Euler, 1823; Letters on Natural Magic, dedicated to Sir Walter 
Scott, 1824 ; A Treatise on Optics, 1831 ; Life of Sir Isaac Newton, 1831 ; 
The Martyrs of Science] or. Lives of Galileo, Tycho Brahe, and Kepler, 1841 ; 
More Worlds than One, the Creed of the Philosopher and the Hope of the 
Christian — an answer to Professor Whewell’s Plurality of Worlds, 1854; 
Memoirs of the Life, Writings, and Discoveries of Sir Isaac Newton, 1855. He 
also edited a translation of Legendre’s Geometry. 
Professor Wheatstone has received the honour of Knighthood, a recogni- 
tion of merit, assuredly late, and well deserved. 
Heat Generated by Magnetism. — We find the following recorded in a con- 
temporary as an experiment devised by M. Louis D’Henry. If a magnet 
with poles pointing upwards be rotated rapidly on a vertical axis below a 
small copper plate, on which a glass flask is placed, the air contained in the 
flask will be heated, and its expansion may be made visible by any suitable 
arrangement, or a copper vessel of water might be substituted for the flask 
and plate, and by a sufficiently rapid rotation the water might, no doubt, be 
made to boil. 
The Theory of Phlogistics has received very elaborate discussion from Mr. 
Rodwell in an excellent paper published in the philosophical Magazine for 
January. 
The Sprengel Air-Pump is of course familiar to our professional readers. 
The following account of it, however (from the science columns of the 
Illustrated London News') is so simple and intelligible that we extract it for 
the benefit of amateurs. It consists substantially of a glass tube with a funnel 
at the top containing quicksilver. If the quicksilver be permitted to flow 
down the tube in drops, each drop will act as a piston and carry some of the 
contained air before it, and a vacuum will thus be produced in the tube or in 
any vessel with which it may be connected sidewise by a pipe. The mercu- 
rial column will, in fact, produce a vacuum like that called a Torricellian 
vacuum, and which is obtained by filling a tube, over 30 inches long and 
closed at one end, with mercury, in the manner of a barometer ; and then, 
by inverting the tube, the mercury will in part run out and a vacuum will 
be formed above the mercury. A column of mercury about 30 inches high 
produces a pressure which balances the pressure of the atmosphere. 
Floating Soap-bubbles in Carbonic Acid. — Mr. Woodward of the Midland 
Institute, Birmingham, describes the following method of preparing a glass- 
case in which to hold the carbonic acid, and of preparing the bubbles for the 
purpose of experimentations. A vessel in which to hold the carbonic acid 
may conveniently and cheaply be made by getting five square pieces of 
glass — they should be at least 30 or 40 c. square — and joining their edges 
by bibulous paper soaked in glue, so as to form a cubic shaped vessel. When 
the glue is dry a strip of cloth about two centimetres wide should be glued 
