Intelligence and Miscellanies. 375 



sion of the numerous monkies which inhabit those regions : 

 at the end of this cord is a gourd-shaped nest, divided into 

 three apartments, the first of which is occupied by the male, 

 the second by the female, and the third containing the young; 

 and in the first apartment, where the male keeps watch while 

 the female is hatching, is placed on one side, a little tough 

 clay, and on the top of this clay is fixed a glow-worm to af- 

 ford its inhabitants light in the night time." 



A similar fact is familiarly known with respect to the hang- 

 ing bird of this country. Its nest, formed like a purse, is 

 pendulous from the high and slender branches of the trees, 

 and is scarcely accessible in any way toinvasion. 



15. Chalcedony. 



TO PROFESSOR SILLIMAN. 



New York, January 9th, 1829. 



Dear Sir — Mr. John C. Thomson, of Brooklyn, has hand- 

 ed to me a specimen of chalcedony, to be forwarded to you, 

 for your mineralogical cabinet. 



It came into his possession a few years since, from the bal- 

 last of a vessel. He does not recollect what port she arrived 

 from, and of course cannot assign to the stone a geographic- 

 al location. Yours, very respectfully, 



J. M. Ely. 



The above remarkable specimen is a geode, of from six to 

 eight inches in diameter, lined with blue, white, and grey 

 chalcedony, in mamillary, and botryoidal, and stalactitical 

 concretions. It is indistinctly agatized, and altogether presents 

 a remarkable appearance. It has evidently been an imbedded 

 specimen, and we should not hesitate to say, that it was 

 probably derived from a trap rock, (the most usual repository 

 of chalcedony,) were it not that there is no portion of this 

 kind of rock adhering to its outside ; but, on the contrary, it 

 seems to have been enclosed in madrepore coral, with which 

 a good deal of the exterior surface is thinly covered. This 

 makes us the more regret that its locality is unknown, as such 

 an association, if not novel, is singular. Perhaps it may 

 have proceeded originally, from a trap rock near the sea, 

 whose decomposition may have allowed it to fall into the 

 water, where coralline animals may have constructed their 

 cells around it, and it may have been again detached by de- 



