334 New Scientific Books. [AprRiL, 
Phil. Mag. vol. xvi. p. 252, where all the particulars are stated by 
Dr. Rhodes, who witnessed the insertion of the matter, and the 
progress of the vaccine disease throughout its whole course, The 
subject was afterwards tested with variolous matter, and the consti- 
tution found proof against its effects. 
Your friend and constant reader, 
London, March 13, 1817. G. 
ArTIcLE IX. 
New Patents. 
Joun Hacus, of Great Pearl-street, Spitalfields ; for improve- 
ments in the method of expelling the molasses or syrup from sugars, 
July 27, 1816. 
Roxsert SALMon, surveyor, Woburn, Bedfordshire; for further 
improvements in the construction of machines for making hay. 
July 27, 1816. 
Joun Poors, of Sheffield, victualler; for brass and copper 
plating, or plating iron or steel with brass or copper, both plain and 
ornamental, and working the same into plates, bars, or other 
articles. Aug. 3, 1816. 
Joun CHALKLEN, of Tower-street, Seven Dials, London ; for 
improvements in or on valve water-closets. Aug. 3, 1816. 
Witi1am Henry, of Manchester, Doctor of Physic; for im- 
provements in the manufacture of sulphate of magnesia, commonly 
called Epsom Salts. Aug. 3, 1816. 
Jonun Dayman, of Tiverton, gentleman; for a method of. 
covering or coating iron, steel, and other metals, or mixtures of 
metals with tin, lead, copper, brass, or other metals, or mixtures of 
metals. Aug. 3, 1816. 
ARTICLE X. 
Scientific Books in hand, or in the Press. 
Mr, Brown, of St. Germains, Cornwall, is preparing for the press 
an agricultural work on the irrigation of land, which he will treat of in 
a perfectly novel manner. 
Sir William Adams is about to publish A Practical Inquiry into the 
Causes of the frequent Failure of the Operations of extracting and 
depressing the Cataract, and the Description of a new and improved 
Series of Operations, by the Practice of which most of these Causes 
of Failure may be avoided. 
Mr. Mill’s long expected History of British India is now in the press, 
and will be published in three 4to. volumes. 
Dr. Spurzheim’s new work, entitled, Observations on the deranged 
Manifestations of the Mind, or Insanity, is in the press. 
Mr. James Sowerby is preparing a Midland Flora, comprising the 
indigenous plants of the more central counties. 
