NOTES AND QUHIMUK. 
459 
When wo consider tlic immense lapse of ages wliieli liave iuloiToued between 
tlio lime wiien ilu; VVealdtui l)cds were formed, and tlic present- age, it certainly 
is an object of no conunon iiilerest to Ihul ahaost tiic identical organization 
made use of wlicu a similar being is called iuto existence, even after the lapse 
of conntless ages. 
Docs not t his fact point rather to some universal law, according to which cer- 
tain structures were associated with certain forms, predcternuned by Him, to 
whom time is as nothing, ratlier than to a law of incessant change or develop- 
ment tiirough successive ages ? — John Edw. Lle, F.G.S. 
British Bracihopod.v. — [Extract of letter from T. Davidson, Esq.] — 
" I can assure you that I have never worked harder than duruig tlie pre- 
sent year, and I shall have got tiirough a considerable amount of, I hope, 
good work. You will be glacl to learn that I have been attacking the genus 
Produetus, and have made out thirty species in the liritisii Carboniferous 
st rata, rejecting many old ones, however, and introducing others new to England. 
Among these I may name Prod, annineus, P. prol/oscideuK, P. sinuatiit-, P. 
Kei/setiiiifjiaiia, P. arcuarcm, P. Wrlghtii, and one or two more. I have 
spared no trouble in assembling all the best British material. I shall try to 
complete ni j Carboniferous Monograph next year : it will contain fifty or more 
))lates ; and hope to be ready soon with another part for the Palceontological 
Society. I have also worked out the Indian Carboniferous species, and have two 
or three more papers in hand for the winter." 
Exchanges and Purchases of Fossils and Books. — Sir, — I think many 
of your subscribers will be, like myself, desirous of making exchanges of dupli- 
cate fossils, without knowing to what gentlemen to apjily. I think it 
would be well if you could invite geologists to send in their names and places 
of abode, and particularly also the characteristic strata of their localities, that 
we might enter into correspondence with one another, so as to make such ex- 
changes as we desire for our private collections. Examjile. — Cretaceous Eorma- 
tion. — "Upper Chalk, Middle Chalk, Red Chalk.— IIobt. Mortimer, Eimber, 
Malton, Yorkshire. 
We shall be happy to assist in these exchanges, as we have said on many 
former occasions. It seems to us, however, that the best way would be to 
open a page in our advertising sheet at a small fee, where we would print the 
names of fcssils offered, and those required in exchange. Erom numerous 
applications for the purcliase of geological works, we think it would also be desir- 
able to do tlie same with regard to books, quoting those offered for sale and 
those which are wanted for purchasers. — Ed. Geol. 
Meteorite of Agram. — Director Haidinger communicated last year to the 
Imperial Academy of Vienna the original document, written in Latin, concern- 
ing the fall of this iron mass, as observed by eye-witnesses and confirmed by 
the official testimony from the ecclesiastical authorities of Agrara. Another 
contemporaneous document, illustrated by a drawing, gives an account of the 
same phenomenon, as observed at Szigetlivar, fifteen Austrian miles east of 
Agram, by some officers and clergymen. The apparent diameter of the fiery 
globe, as observed at this place, was equal to that of the sun, which (if its 
altitude, as calculated from this and other observations, amounted to about ten 
German miles) answers to a real diameter of more than three thousand feet. 
This, if compared with the solid mass which fell to the ground (fifty-seven feet 
in all), indicates an enormous development of ignited gaseous substances. 
The luminous train of the bolide perished more or less distinctly from six to 
ten p.m. The apparent point of its departure, as made probably by the dii-ec- 
tion of its orbit, was the constellation of Perseus, from which next to Leo the 
majority of igneous globes are apparently proceeding, as observed by MM. 
Olmsted, Ileiss, Tul, Schmidt, &c. 
