•24 BULLETIN OF THE NATURAL HISTORY SOCIETY. 



To ]\Ir. Geoffre}' Stead, C. E., the author is indebted for the- 

 copy of Gesner's map in hhick-liiie hatching which accompanies 

 this paper. (8ee page 39). 



It lias l)een thought that Dr. Jas. llobb's geological map of 

 New Brunswick embodies that of Dr. Gesner, but on a compari- 

 son of the two I find that this is not the case. It seems, there- 

 fore desirable that this first geological map of the province 

 should be published so that those who wish to read Dr. Gesner's 

 reports may do so with a map before them. 



The publication of the map is also desirable, as no oppoi'tunity 

 has heretofore been given to compare it with the geological map 

 of New Brunswick published some years later by Dr. Jas. Robb.* 

 It also affords the means of comparison with the geological map 

 of New Brunswick, etc., published by the Dominion Geological 

 Survey. 



Dr. Gesnei-'s original map represents only the first thref^ 

 vears of his explorations, but from the one filed with the Crown 

 Lands Department at Fredericton, a copy of which I received 

 through the kindness of Mr. Loggie, I have added the results of 

 his fourth year of exploration. This extends the map as far as 

 AVoodstock on the western side of the province, and to Shippegan 

 on the eastern. 



There is no index to the several geological formations on the 

 original map, but the colors used by Gesner are easily understood 

 from his reports, and from the index on the copy of the map in. 

 the Crown Lands Office. 



Eight divisions are indicated by the colors on the original 

 map, and ai'e as follows : 



Lias Limestone. 

 New Red Sandstone. 

 Coal Formation. 

 Mountain Limestone. 

 Old ]led Sandstone. 

 Graywacke System. 

 Syenite, Trap, etc. 

 (jlranite. 



* Published witli Johnston's Report on the Agricultural Oapabilities of New 

 Brunswick. But many copies of this report were issued without any fjeoloKical 

 map. At page 6, Dr. Robb tells us that his map was to a great extent based on the 

 reports of Dr. Gesner. 



