207 



Cladonia ccespiticia, delicata, Jimlriata. Biatora placophylla^rivu- 

 losa. Lecidia sorediata. Umbilicaria pustulata. Opegrupha atra. 

 Calicium subtile, trachelinum. Epkebe pubescens. 



Mr. Tuckerman also communicated memoranda of a glacier, or 

 field of ice, observed by Mr. C. W. Goddard and himself, on the 

 4th November, 1844, just below the summit of the Peak of Mt. 

 Washington, on the western declivity. It was 80 feet long, 20 

 feet wide, and, at its upper edge, a foot thick. Its inclination was 

 about 45°. The whole of the mountain was, at the time, covered 

 with snow, which, throughout the alpine district, lay pretty thick. 

 The upper part of the peak of the mountain was covered with ice, 

 thinly sprinkled with snow. 



Dr. C. T. Jackson communicated a paper from Mr. A. 

 A. Hayes, containing analyses of specimens of meteoric 

 iron, furnished him for the purpose by Dr. Jackson. 



The object particularly in view, in making the analysis, was to 

 ascertain the presence of chlorine, as observed by him, and pub- 

 lished in the American Journal of Science, Vol. 34, 1838. The 

 result was, a confirmation of Dr. Jackson's discovery, and the es- 

 tablishment of the fact of the existence of chlorine as a constituent 

 part of meteoric stones. 



Dr. Jackson also communicated a paper, entitled " Re- 

 marks on the Alabama Meteoric Iron, with a chemical anal- 

 ysis of the drops of green liquid which exude from it." 



Dr. Jackson stated, that he made an analysis of the Alabama 

 meteoric iron, in August, 1S34, and published the results of that 

 analysis, in 1838. The discovery of the combination of chlorine 

 with nickel and iron, was then first announced, and was a new 

 and interesting fact in the science of meteorites. Professor C. 

 U. Shepherd had since confirmed the discovery, by experiments 

 on meteoric iron from Buncombe, N. C, but seemed to doubt the 

 origin of the chlorine. Dr. Jackson stated that no one who had 

 seen his specimen could doubt, for chlorohydrates of nickel and 

 iron are copiously effused from the interior of the mass, and from 

 every point of the cut and polished surface. Drops of a grass 

 green liquid, from the size of a pin's head to that of a pea, are 

 continually forming upon it, and run down upon the shelf of the 



