ANNIVERSARY ADDRESS OF THE PRESIDENT. xlv 



Of his works, the 'Familiar Introduction to Crystallography' was 

 the first systematic treatise which in this country brought that de- 

 lightful branch of science into notice : it was based on the system of 

 Haiiy, and adopted therefore an unnecessarily large number of pri- 

 mary forms : but at the same time the relations of the various ex- 

 isting plane surfaces of crystals were traced out with a clearness 

 which was a great improvement on preceding systems. In the 

 subsequent Treatise on Crystallography, published in the 'Ency- 

 clopaedia Metropolitana,' Mr. Brooke simplified the former one, and 

 reduced the number of primary forms to six, which correspond with 

 the six systems adopted by Continental Crystallographers. Mr. 

 Brooke discovered and described thirteen new mineral species. 



Mr. Brooke applied the reflective goniometer to the determination 

 of the crystalline forms of artificial salts, and in the * Annals of Phi- 

 losophy' for 1823 described no less than fifty-five laboratory- crystals 

 thus determined. He was the author of the article " Mineralogy" in 

 the ' Encyclopaedia Metropolitana,' and was associated with Professor 

 W. H. Miller in the reproduction of the well-known treatise of the 

 late Mr. Phillips. His last work was on the general relations and 

 geometrical similarity of all crystals belonging to the same system ; 

 it formed the subject of a paper read before the Royal Society, and 

 was in the press at the time of his decease. With a liberality equally 

 characteristic both of Mr. Brooke the elder and the younger, the 

 valuable and almost unique collection made by the father during 

 half a century, has been presented by the son to the University 

 of Cambridge, — a generosity which has wisely adopted the most 

 efficient method of perpetuating the memory of a man who had so 

 successfully endeavoured to simplify the study of that branch of Mi- 

 neralogy which of all others is most full of interest ; for assuredly 

 crystallization seems to afford a sort of link between organic and in- 

 organic nature, by showing that not only in composition, but also in 

 external form, lifeless and inert matter has been subjected to definite 

 laws by creative Intelligence and Power. 



Francis, Earl op Ellesmere, a Knight of the Garter, Lord- 

 Lieutenant of Lancashire, and during the year 1854-5 President 

 of our sister Society, the Geographical, was one of those eminent 

 individuals who in our day have shed lustre over the high order of 

 nobility to which they belong, by their literary and scientific acquire- 

 ments, just as their ancestors, in olden time, did by martial qualities. 

 It is indeed a characteristic of the present age, which is principally 

 due to the establishment of societies devoted to special branches of 

 scientific inquiry, that men of the highest social position do not dis- 

 dain to emulate men of a lower grade in the endeavour to obtain the 

 first places in the ranks of science. Lord Elles'mere was the second 

 son of the first Duke of Sutherland, and of that gifted lady the 

 Duchess Coimtess of Sutherland. He was born in 1800, and died on 

 the 18th February, 1857, being therefore cut short in his distin- 

 guished career at the comparatively early age of 57. As a geogra- 

 pher of a high order, Lord Ellesmere has received an affectionate and 



