Con-e.y)ondence — J. E. 3larr — IL Biil/cn Nricfon. 189 



KVAl'ORATIOX AND SUBLniATlOX. 



Sir, — As long ago as September, 1900, I observe that the writer 

 who reviewed my book on '-The Scientific Study of Scenery" in 

 this Magazine criticizes my use of the term suhUmafiou. 



He says: "In alluding to the evaporation of snow and camphor 

 the process is referred to as ' sublimation.' In Watt's Dictionary 

 of Chemistry sublimate is defined as ' a body obtained in the solid 

 state b}' the cooling of its vapour.' " 



Nevertheless, I believe that I use the term correctly, and in 

 support of this assertion let me further (juote Watt's Dictionary 

 (1894 edition, vol. iv, p. 524). Sublimation is there defined as 

 " The passage of a solid body, when heated, to the state of va^wur 

 without melting." 



I take this opportunity of thanking the writer for the appreciative 

 notice, which contains many suggestions which I should gladly 

 utilize, if a second edition of ray book should be called for. 



J. E. ]\Iakr. 



Camiuuuge. 



MALAY PENINSULA LIMESTONE. 



Sir, — Since the publication of my paper in last month's 

 Geological Magazine,' where I compiled some notes on the 

 geology of the Mala}^ Peninsula, and took occasion to remark that 

 in the absence of fossils it Avas impossible to correlate the limestones 

 of that country with any definite horizon, some further samples of 

 the same rock have been submitted to my notice by Dr. Henry 

 Woodward, F.K.S. 



This new material was collected a few years back by the late 

 Mr. H. M. Becher, at Gua Sai, Penjom, Pahang, and is of precisely 

 similar appearance to the paler-coloured limestones obtained by 

 Mr. R. M. W. Swan from the River Tui District, which he found 

 associated with those of a dark variety referred to in my paper. 



The ' Becher ' specimens are important from the fact that they 

 exhibit organic structures, a feature pointed out by Dr. G. J. Hinde. 

 F.R.S., on a manuscript label dated January 7th, 1899, who thus 

 describes them: — "Very fine-grained bluish limestones. The ojily 

 organisms recognizable are Crinoidal stem-joints. Tliere are traces 

 of other organisms with which the rock seems to have been filled 

 originally, "but they are now nearly obliterated and are not 

 determinable." 



This report, however, leaves us still without a clue as to the age 

 of the limestone, and we shall require more accurate palreontological 

 evidence before that desirable point can be permanently settled. In 

 the meantime mention may be made of the presence of an obscure 

 Crinoidal fragment on one of the weathered surfaces of this rock, 



1 "Notes on Literature beariut? upon the Geology of the Malay reninsula : willi 

 an account of a Neolithic Implement from that i-ountry " : Oeoi.. Mao.. 1!»01. 

 pp. 128-134. 



