352 



Miscellaneous. 



We learn from Bull. Soc. geol. France, vols, xi.-xiv., and series 2, 

 vols. i. &c, that 71 parts were issued between February 1840 and 

 November 1845, that 12 parts went to a volume, and other detailed 

 particulars. These dates must be used cautiously, as they represent 

 the dates of presentation to the Society, and, though in most cases 

 it is unlikely, they may be several months after publication. 



We give on p. 351 the collation of the several copies we have ex- 

 amined and the actual dates of issue of the completed volumes. 



The following are the dates of presentation of the livraisons to the 

 Geological Society of France, which can be verified by a reference to 

 the ' Bulletin ' of the Society : — 



From which it will be seen that the parts came out monthly, and 

 there is no doubt that the 1st livraison appeared in December 

 1839 and the 71st livraison in October 1845. This accords both 

 with the accounts of previous bibliographers, who usually ascribe 

 the work to 1839-1849, and with the receipt of the livraisons by 

 the French Geological Society. Thus, according to the data, each 

 volume should have been completed in parts by the December of the 

 year, and issued as a whole in the January following. Up to 

 livraison 72, the end of vol. vi:, this was undoubtedly the case, but 

 there our record ceases, and there is plenty of evidence to show 

 that the remaining 78 livraisons (there were 150 in all) came out in 

 less than four years. We therefore urge the advisability of adhering 

 to the dates of the completed volumes rather than to any speculative 

 date of livraisons. Sets dated 1861 are merely re-issues with new 

 titlepages. 



* No doubt omitted in due course by publisher, and supplied later by 

 request. 



