Search our collection

Clear all filters
Image
Category
Maker
Object type
Place
Date

Pure tungstic acid. Prepared by Dr. Percy, after the method of Berzelius

before 1889

Experimental alloy of nickel with 5 percent tin

1845
[Ms. notebook] Light. Oct: 1844. [Volume records Percy's experiments, with George Shaw of Birmingham, 'on the alteration of chloride of silver by light'. Later entries refer mostly to metallurgical subjects. Bears prefatory note by John Spiller, vice-president of the Photographic Society of Great Britain, to whom the volume was given by Percy's executors in 1890]

Light. Oct: 1844

1844-1874
Refining of Tin. 'Hard head' fused with sulphur. Experiment by Dr. Percy, 1858. 'Hard head' being produced from roasted ores, contains little or no sulphur, and on fusing with sulphur the metals become sulphides. This is a compact, porous, regulus-like mass.

Experiment to fuse 'hard head' tin with sulphur

1858
[Collection of letters, 1840-1888, to Dr. John Percy F.R.S. from individual donors etc of specimens to what became the Science Museum's Percy collection of metallurgy. Each letter, or group of letters, bears a number which relates to the numbers in the 'Catalogue of the collection of metallurgical specimens formed by the late Dr. Percy, F.R.S.' (1892) by Prof. J.F. Blake, a copy of which is kept with the letters. Slips accompanying some of the letters are very often later notes written by Percy clarifying the specimens' provenance. Many items also bear similar notes by Percy, but are not always mentioned in the listing which is available of the letters. 1 box, plus 1 box of miscellaneous]

Collection of letters, 1840-1888, to Dr. John Percy

1840-1888