LINNEAN SOCIETY OF LONDON. XXV 



inhabitants; and if it were so pursued, those who study shells 

 alone might, without the fear of being regarded as triflers, confess 

 themselves to be conchologists, and might thus assert their title 

 to a place in the ranks of science." Mr. Brooke's reputation as 

 a man of science was, however, chiefly derived from the eminence 

 which he attained as a mineralogist, and especially as a crystal- 

 lographer, in which department he stood almost unrivalled in this 

 country. His " Familiar Introduction to Crystallography, including 

 Explanations of the Principle and "Use of the Groniometer," was 

 published in 1823, and was followed, at a considerable interval, by 

 a treatise on the same subject in the ' Encyclopaedia Metropolitana.' 

 In the latter of these works he greatly simplified the system which 

 he had proposed in the former, and reduced the number of primary 

 crystalline forms to six. With much labour and perseverance, he 

 applied the reflective goniometer to the crystals of artificial salts, 

 and published, in the * Annals of Philosophy' for 1823, the deter- 

 mination of the forms of no fewer than fifty-five different laboratory 

 crystals. He published also numerous mineralogical notices,' in- 

 cluding the description of thirteen new mineral species, in the 

 pages of the ' Philosophical Magazine' and 'Annals,' and in the 

 ' Edinburgh Philosophical Journal,' and was the author of the 

 treatise on mineralogy in the ' Encyclopaedia Metropolitana.' His 

 latest labours were directed to the general relations and geome- 

 trical similarity of all crystals belonging to the same system, a 

 paper on which subject, read before the JRoyal Society, was in the 

 press at the time of his decease, and affords a striking proof how 

 little his advanced age had diminished the strength and energy of 

 his reasoning powers. He died, at his residence at Clapham, on 

 the 26th of June, 1857, soon after completing the 86th year of 

 his age, from natural decay, accelerated by the depression of his 

 system produced by a severe cold ; and his splendid collection of 

 minerals has since been presented to the University of Cambridge, 

 as the best means of rendering it subservient to the advancement 

 of mineralogical science. 



William Maddochs Bush, Esq., M.D., died at "Weston-super- 

 Mare on the 17th of December, 1857, aged 44 years. Dr. Bush 

 completed an excellent general education at Eton in 1830, when 

 he commenced his course of medical studies at St. George's Hos- 

 pital, and subsequently prosecuted them at the London University. 

 Having become a Member of the Hoyal College of Surgeons of 

 England, and a Licentiate of the Society of Apothecaries, he was 

 appointed one of the House Surgeons of the Marylebone Infirmary, 



