38 EEPOET — 1893. 



desirable that a series of observations should be made to determine the 

 relative values of woodlands and heather in protecting land, and was 

 inclined to suggest the formation of a committee for that purpose. Mr. 

 Watts said he would be glad to give information as to the method 

 followed in Rochdale. 



Geological Photography. — Mr. Jeffs, Secretary to the Photographic 

 Committee, being absent, had asked Mr. Arthur S. Reid (East Kent) to 

 speak about its work. Mr. Reid said that the number of the photographs 

 was about 700. He exhibited a specimen volume of photographs, and 

 explained the way in which they were mounted and bound. He thought 

 it important that some uniform plan of photographing geological subjects 

 should be adopted, and that the plates used should be orthochromatic or 

 isochromatic. The Committee had, asked to be reappointed. He hoped 

 the delegates would try to make their societies active in this matter. 



Mr. William Gray said that he thought the Belfast Naturalists' Field 

 Club had its work fairly well represented by the photographs exhibited. 

 They had sent more at first because they then had them in stock ; and 

 their quality had improved. They were also photographing antiquities, 

 and producing lantern-slides which were very valuable for educational 

 purposes. His society had an excellent collection of geological and 

 antiquarian lantern-slides which it would be delighted to place at the 

 service of any of the other societies, or of any member of the British 

 Association interested in educational work. 



Dr. T. Stacey Wilson mentioned that the Birmingham Philosophical 

 Society had appointed a sub-committee for geological photography. 



Mr. J. Barclay Murdoch, as Secretary to the Glasgow Geological 

 Society, said that his society had not sent in any photographs because it 

 had been found difficult to organise the work. He had, however, drawn 

 up a preliminary list of localities to be illustrated, and this list had been 

 circulated among the members, who were asked to return either photo- 

 graphs of the places named or information as to photographs of them 

 already existing. 



The Chairman recommended orthochromatic plates. They might be 

 more expensive, but they were decidedly preferable for geological photo- 

 graphs. 



Section D. 



The Chairman invited remarks on the destruction of native plants and 

 of wild birds' eggs. 



I)isap2^earance of Native Plants. — The Rev. E. P. Knubley (Yorks. 

 Nat. Union) alluded to the report presented to Section D on this 

 subject, which had been drawn up by Mr. D. E. Boyd. In it were men- 

 tioned some of the causes leading to the disappearance of native plants, 

 such as marine erosion, agricultural drainage, and the growth of towns 

 and villages. In addition to these influences were the formation of 

 herbaria, the exchange of botanical specimens, the removal of plants 

 into gardens, and the large numbers of ferns and other plants exposed 

 for sale ; and there were great difficulties in the way of any attempts at 

 prohibitive legislation. Many plants had wholly or almost wholly dis- 

 appeared from the west of Scotland. Mr. Watts said that two or three 

 members of the Rochdale Society proposed to work at this subject. 

 Mr. Mark Stirrup had a short paper by Mr. Leo H. Grindon on the dis- 



