Reviews — Collins s Mineralogy of Cornwall and Devon. 569 



this moment reached us, completed, since our lamented friend's 

 death, by Prof. Geikie, F.E.S., Director of the Geological Survey of 

 Scotland. 



This memorial volume of letters, prepared by the loving hands of 

 his sister, Mrs. A. H. Browne, is enriched by an admirably-engraved 

 portrait of Professor J. Beete Jukes, true to life, but v^ithal a little 

 too sad, as if the care that oppressed his later years saddened his 

 thoughts at the very moment when his photograph was taken. 

 There are abundant evidences throughout the book, however, to 

 prove that Mr. Jukes was by no means a dull companion or cor- 

 respondent, and we only regret that space precludes our giving a 

 fuller notice of him. We will conclude this sketch with an odd 

 verse of a geological rhyme, intended, doubtless, for one of those 

 annual dinners of the Survey which the genius of the late Professor 

 Edward Forbes rendered notable events to every member of the 

 staff :— 



" Then roll, roll, 



The rocks like a scroll. 

 Let them be " flat," or "upright," let them stand; 



By " strike " and by " dip," 



Through "fault" and through slip," 

 We'll map them and section them right through the land." 



[Extracted from a letter to Dr. Ingleby, p. 377]. H. W. 



II. — A Handbook to the Mineralogy op Coknwall and Devon, 

 with Instructions for their Discrimination, and Copious Tables 

 of Localities. By J. H. Collins, F.G.S., etc., etc. 8vo. pp. 

 182. Ten Plates. 1871. Truro : Heard and Sons. London : 

 Longmans. 



THE most useful books on our shelves, or perhaps in any library, 

 are the dictionaries. They form a goodly company ; broad 

 backed and sturdy, each capable of standing alone ; catholic in their 

 usefulness, but the very type and bulwark of the nationalities in 

 their individual distinctness. 



This little book may be classed with them, for the second part, 

 which occupies the greater bulk of the work, is arranged alphabeti- 

 cally, after the style of Bristow's Glossary of Mineralogy, but in- 

 cludes, interpolated with the names of minerals, technical terms and 

 apparatus, etc., required in the determination of their identity ; and 

 the first is also so arranged as to be equally convenient for reference. 



Immediately on opening the book we perceived that Mr. Collins 

 must be a thoroughly practical man from his style, for all his sen- 

 tences are to the point, and in the fewest number of words, — a great 

 advantage in this verbose age, — although his English is occasionally 

 open to criticism, as will be seen by merely a glance at the title. 

 We will follow his example, and without further delay describe the 

 contents of the Handbook. 



In the first chapter, after defining what is meant by the word 

 " mineral," and laying down the rules for the systematic determina- 

 tion of a specimen, he gives a list of the apparatus and few chemicals 



