S18 Scientific Intelligence. [April, 



IX. On the Organic Remains in Plymouth Lime-stone. 



(To Dr. Thomson.) 

 SIR, Citadel, Plymouth, March 0, 1815. 



In the last Number of the Annals of Philosophy there is a letter 

 on my having found madrepores and shells in the liir.e-stone rocks 

 at Plymouth. I should probably not have troubled you with a 

 reply, had it not been stated that no shells had been observed in 

 those rocks " in situ." It appears Dr. Leach is not awaie of the 

 discovery of a bed of lime-stone, abounding in shells, in the dock- 

 yard ; and probably he is equally unacquainted with my com muni-, 

 cations to the Geological Society, and the specimens which I have 

 sent for the use and inspection of its members. In addition to 

 these, I could show him many varieties of shells which I have ob- 

 tained from various parts of the rocks in this neighbourhood. I 

 might add, about the same time. 



^Vith respect to the madrepores, Dr. Lockyer, with some other 

 friends, accompanied me in one of my visits to the quarry where I 

 first found them ; and he was of opinion, I remember, that they 

 had more the appearance of imbedded stalactites than of animal 

 remains ; and, as I was of a different opinion, in sending some 

 specimens to the Geological Society, 1 thought they might be in- 

 teresting at least, if they did not tend to any useful purpose. 



As to the specimen in my possession of what Dr. Leach calls 

 madreporite of a fine blood-red colour, I never considered it as 

 such, but of a quite different nature. It was given to me several 

 ' years ago, as coming from the neighbourhood of Stonehouse, or 

 Devil's Point, and believing it to be the case, I have made many 

 attempts to discover its native bed, though without success. 



I have no time for uninteresting or useless writing ; but deeming 

 the field of Science and Natural History open to all who are dis- 

 posed to enter it, 1 shall continue my researches as hitherto, with- 

 out giving, I hope, at least without intending to give, offence to 

 anyone; and certainly without assuming to myself the merit (if 

 any) which others may think due exclusively to their own labours. 



I have the honour to remain. Sir, your obedient Servant, 



Richard Hknnah, Jun. 



Article XIII. 



Scientific Books in hand, or in the Press. 



Dr. Ronalds, of Coventry, is preparing for the Press a Translation 

 of the celebrated little work of Cabanis on Certaintj- in Medicine. 



Mr. Huish will sliortly publish a Scientific and Practical Treatise on 

 tho Management of Bees, with Plates. 



Mr, Parke?, the author of the Chemical Catecliism, has in the Press 

 a series of Chemical Essays, to be published in four pocket volume?, 

 jncludmg a variety of Explanatory Notes, and an Index. It will be 

 illuatrated with more than 20 Copper-Plate Engravings. 



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