LOAN COLLECTION OF SCIENTIFIC APPARATUS. 
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form separate groups. This section of the collection possesses so many 
objects of interest that it is hardly possible to do justice to it in a short 
notice, and we can only enumerate some of the most important, which will 
be found in the catalogue under Sections 11, 14, 15, 16. These are : an 
astrolabe of Sir Francis Drake ; a quadrant of Tycho Brahe ; Newton’s 
telescope ; a quadrant of Napier ; a transit instrument made by Lingke, of 
Freiberg ; a telescope by Huyghens, and eye-pieces ground and polished by 
him; Sir W. Herschel’s 7-foot telescope, and his 10-foot Newtonian re- 
flecting telescope ; the Galileo and Torricelli relics from Florence, including 
two telescopes made by the former ; Baily’s apparatus ; Gauss’ pendulum 
for demonstrating the rotation of the earth ; Gravesande’s heliostat ; a com- 
plete Transit of Venus equipment; Colby's compensation-bars used in the 
measurement of the basis in the north of Ireland in 1827 and on Salisbury 
Plain in 1849 ; Ramsden’s 36-inch theodolite and his smaller 18-inch one, 
which was set up over the cross at St. Paul’s Cathedral ; the surveying in- 
struments in use on the Prussian survey ; instruments and apparatus used 
by H.M.’s ships in deep-sea exploration ; mining instruments ; and a fine 
collection of meteorological instruments. In Section 15, “Geography,” 
may be noticed some of Livingstone’s instruments ; MS. plans of Living- 
stone, Burton, Speke, Grant, and Stanley; MS. journals of Cook, Franklin, 
and Parry ; the log of the Bounty ; the Ordnance Survey collection of maps ; 
specimens of the survey of Palestine ; and some good models of ground. In 
Section 16, “ Geology,” will be found the apparatus employed in Sir James 
Hall’s celebrated experiments ; specimens of the work of the Geographical 
Survey; illustrations of the Sub-Wealden boring; original sketches by Dr. 
Buckland ; Davy’s safety-lamp ; and the latest improvements in goniometers. 
In Section 18, “Biology,” are Van Leuwenhoek’s microscope; Van Mus- 
schenbroek’s microscope ; the instruments used by Hooker, Dawson, Turner, 
and Brown, and the instruments recently described by the Rev. Mr. 
Dallinger, in the Monthly Microscopical Journal ; and apparatus used 
in the several branches of physiological research. In Section 13, 
“ Chemistry,” are the apparatus employed by John Dalton in his classical 
researches; balances used by Sir Humphry Davy and Dr. Joseph Black; 
Faraday’s apparatus for the condensation and liquefaction of gases; 
Dr. Andrew’s apparatus for proving that ozone is a condensed form 
of oxygen ; and a collection from the Master of the Mint, illustrating 
the processes of gold and silver assaying, including an old cupellation fur- 
nace supposed to have been used by Sir Isaac Newton. The collection of 
physical apparatus is of very great interest ; under the head of “ Molecular 
Physics,” Section 5, are a small model of Colladon’s new air and gas com- 
pressors used for the St. Gothard Tunnel; Von Guericke’s air-pump and the 
two celebrated Magdeburg hemispheres exhibited at Ratisbon in 1654 ; the 
first air-pump with two barrels ; Thilorier’s apparatus for liquefying car- 
bonic acid ; the apparatus employed by Dr. Andrews in his researches on 
the continuity of the gaseous and liquid states of matter ; and a series of 
diagrams illustrating the improvements made in the air-pump. Under 
“ Sound,” Section 6, will be found the apparatus employed by Colladon in 
1826 for ascertaining the velocity of the transmission of sound through 
water ; the double-siren used by Helmholtz in his researches on sound ; Le 
