On the New Jersey Marls. 



vein of marl makes a short turn with the edge of the 

 pines, or whether it there ends, or whether it can be found 

 again at some distance on in the same direction of the 

 veins, my time would not then admit of ascertaining : 

 therefore, in my draft I have ended the veins. As to the 

 other direction north east, my knowledge is quite limited. 

 I know there is marl in that direction across the State ; 

 and I know there is marl at Shrewsbury and in the high- 

 lands of Neversink ; I have seen samples of the isinglass 

 and the gunpowder kinds taken from thence, but how the 

 veins run eastward beyond Burlington county, I am ig- 

 norant : therefore, in my map, I have only laid a general 

 vein of marl. Numbers and letters, with notes, will point 

 out on the map the situation of some of the most noted 

 marl beds, and from some of those, when I have leisure, 

 I intend to take samples, and send on for thy inspection. 

 Although the quantity of marl in Jersey is immense, yet 

 there are but few natural situations from which the best 

 kinds can be taken to advantage, on account of the great 

 body of earth found on them in general, and from the wet 

 situation of them in other places. I have made a table of the 

 different species of marl, and thereon have made such ob- 

 servations as will give an outline idea of the different kinds, 

 and their supposed component parts ; but in doing that, I 

 have only made a rough guess as they appear upon a 

 common inspection, thinking my rough arrangement and 

 ray supposed division of parts will serve as a guide to some 

 abler hand to take up the subject in a scientific manner. 

 The creeks that empty into the Delaware are all short, 

 and only navigable for boats a few miles ; therefore, the 

 isinglass vein is only on navigation ; and it is remarkable 

 that the gunpowder vein is about the same distance from 

 navigation, from Raccoon to Croswick's creek. The use 

 of marl as a manure, was first discovered by hauling it 

 away from around wells and throwing it down in some 



