TRANSACTIONS OF THE SECTIONS. " 95 



coincide with its boundary edges. Any intermediate portion of the 

 square may be ascertained by inserting a slip of wood cut to any known 

 section ; and in this manner the dislocations of strata, or any other phe- 

 nomena, may be at once delineated, so as to enable the workmen to 

 execute it in the model. By this means a connexion is at once esta- 

 blished between the scientific drawings of the geologist and the opera- 

 tions of a common workman. 



The contour of the surface is obtained partly by the upper edge of 

 the section or slips of wood already described, and partly by the use of 

 a gauge or graduated pencil sliding in a frame, and acting in the same 

 manner as the gauge used by sculptors in transferring dimensions from 

 a cast to a block of marble. 



This method of constructing geological models was illustrated by 

 several examples. 



On the Structure of the Teeth. By Professor Owen. (See Medical 

 Science.) 



On the Antiquity of Organic JRemains. JBy the JRev. G. Young, D.D. 



In this communication Mr. Young opposed the inferences generally 

 admitted among geologists, as to the high antiquity of the stratified 

 rocks, and the successive eras of existence of tlae organic remains of 

 plants and animals imbedded in them. He endeavoured to show that 

 the production of the phenomena observed was possible in less time, 

 and with fewer changes in the condition of the globe, than modern 

 writers commonly admit. 



On Peat Bogs. By G. H. Adams, M.D. 



From a microscopic observation of the substance of fresh and old 

 peat, the author described the gradual growth of the^vegetable mass, 

 and its conversion into condensed peat. To render peat bogs fit for 

 agricultural purposes, the author proposes to take oif the upper part, 

 and to burn it in large smouldering heaps, using the ashes as manure 

 for the subjacent peat surface. He also notices the practice of sprin- 

 kling diluted sulphuric acid over and through heaps of the surface-cut 

 peat, thus ' souring ' the peat and rendering it of considerable value as 

 manure. 



