PROVISIONAL REPORTS AND NOTICES. 213 



from the ductility of that metal. The necessity of enlarged inquiries in these 

 matters will be seen, when it is reflected that calculations of the tensile strength 

 of cast-iron, or marble, or stones in general, made from the transverse strength 

 by the modes used by Tredgold, Navier, and others, give the tensile strength 

 twice or three times as great as it ought to be. The paper, of which a short 

 notice is here given, will, when completed according to the author's wish, be 

 offered to the Royal Society. 



Report of the Committee for Deep Dredging. 



Mr. Patterson stated that the Dredging Committee were continuing to 

 collect the materials for their Report on the Marine Zoology of Britain, and 

 announced the results of dredging at depths varying from fifty to one hun- 

 dred and forty-five fathoms, off the Mull of Galloway, by Captain Beechey, 

 R.N., drawn up by William Thompson, Esq.* ; also results of dredging by 

 Mr. Hyndman* off the Mull of Cantire, and off Ballyally Head, co. An- 

 trim, by Mr. Patterson. 



To the Committee of the British Association for advancing our know- 

 ledge of British Belemnites. 



In consequence of receiving from the British Association, through the Com- 

 mittee appointed at Plymouth in 1841, "for the purpose of advancing our 

 knowledge of Belemnites," the sum of 50/., I have renewed the preparations 

 for publishing the Figures and Descriptions of British Belemnites, which 

 were presented (by request) to the Meeting of the Association at Dublin. 

 Notwithstanding the lapse of time since that meeting, but few additional spe- 

 cies have come to my knowledge, though doubtless such may be known to 

 other geologists. I propose, by circulating proof plates already engraved, 

 and of others in progress, to collect information regarding the localities of 

 the known, and the nature of any new species, before printing the descrip- 

 tions already prepared ; but I hope to lay before the Committee, previous to 

 or at the meeting in 1842, specimen pages and plates for their consideration ; 

 and I entertain no doubt that previous to the meeting in 1843, if not in the 

 beginning of that year, I may be able to complete and publish the work. It 

 is proposed to print in quarto, on the same size and general plan as the works 

 of Voltz and Blainville : there will be from ten to twenty plates, arranged 

 with as much regard both to natural affinity and geological position as prac- 

 ticable. The number of plates already in hand is six. 



Malvern, May 13, 1842. JOHN PHILLIPS. 



* For these two communications see Transactions of the Sections, pp. 70-75. 



