556 Revieivs — Geological Survey of Ohio. 



doubted Boulder-clay deposit up the glens to the height of 1000 or 

 1500 feet, even if we find no shells, the elevation unquestionably indi- 

 cates this amount at least (author's italics) of former depression " ? ^ 



On tlie whole, we feel constrained to say, the glacial phenomena 

 of Arran have yet to be described. One good paper on Glen Leister, 

 Glenrosa, or Glencloy, would be worth all we have yet had on the 

 subject. Is there no one among our Scottish geologists who will do 

 in this respect for Arran what Professor Eamsay has done so ad- 

 mirably for North Wales ? Or, better still, will not the Professor 

 himself, revisiting the scene of his early labours, undertake the con- 

 genial task ? That would indeed be something for all " glacialists " 

 to look forward to. 



Meantime, let us part from Dr. Bryce in good humour : for we are 

 his debtors. An earlier edition of his book — which we still prefer 

 to the present — has been (along with " Eamsay ") our companion in 

 many a pleasant ramble over the lovely island of which he treats. 

 And if in what we have written there has been some faultfinding, 

 it is not that we love Dr. Bryce less, but that we love Arran more. 



B. 



II. — Geological Survey of Ohio. Eeport of Progress in 1869, by 

 J. S. Newberry, Chief Geologist; with Eeports by E. B. Andrews 

 and Edward Orton, Assistant Geologists. (Columbus, 1871.) 



Geological Survey of Ohio. Eeport of Progress in 1870, by J. 

 S. Newberry and Assistants. (Columbus, 1871.) 



THE two volumes of Eeports now lying before us afford a striking 

 example of the diligence with which the State Surveys are 

 being carried on in America. Containing the results of only two 

 years' investigation, they yet enable one thoroughly to understand 

 the general stratigraphical structure of Ohio, and moreover give, 

 especially in the form of carefully measured sections, a vast amount 

 of local information, which, when it comes to be put into shape in 

 the final Eeport, cannot fail to prove of the highest value to all 

 interested in the welfare of that State. 



The chief matter of interest connected with the geology of Ohio, 

 from a commercial point of view, is undoubtedly the fact that one- 

 third of the region (the south-eastern) consists of profitable Coal- 

 measures, and naturally enough the first efibrts of Dr. Newberry 



1 Geological reading at tke best is not free from difficulties, but in the page from 

 wbich we have just quoted we encounter this formidable sentence, " The elevation of 

 the [shell] bed above the present sea-level expresses the amount of former depression 

 below that level." After being fairly baffled with this, and giving it up as a geological 

 riddle, we were relieved to find at p. 190 an acknowledgment that the idea here is 

 "obscurely expressed." But why not have "reformed it altogether" in passing 

 through the press ? Another and more serious mistake, which ought surely to have 

 been corrected before publication, is that relating to the height at which the anchor 

 was found in Glenrosa. The statement appears without any note of correction at 

 p. 55, and it is only when we reach p. 166 that we are informed it was totally 

 erroneous ! A few other corrections are needful ; and some of the illustrations 

 (e.g. fig. 21. an "Anticlinal axis") are open to much improvement, — in fact, should 

 either be redrawn or withdrawn altogether. 



