i Guettard' s Mineralogical Maps 2 1 



He found much in these volumes to confirm his surmise. 

 Availing himself of the information afforded by them, he 

 affixed to the map of England the same system of symbols 

 which he had used on that of France, and roughly indicated 

 the limits of his bands across the south-eastern English 

 counties. This portion of his work, however, being founded 

 on second-hand knowledge, is more vague and inaccurate 

 than that which was based on his personal observation in 

 France. 



As an example of the painstaking earnestness with 

 which Guettard made his geological notes, it may be men- 

 tioned that among the symbols he employed on his map 

 there was one for shells or marine fossil bodies, and that 

 this sign is plentifully sprinkled over the map. His 

 reading enabled him also to insert the symbol on many 

 parts of the map of England all the way from the Wash 

 to Sussex. On the map of France, he was able to introduce 

 an additional sign denoting that the shells were not in 

 mere loose deposits, but formed part of solid stone. In a 

 second map, on a smaller scale, accompanying the same 

 memoir, and embracing the whole of Western Europe 

 from the north of Iceland to the Pyrenees and the 

 Mediterranean, Guettard marked by his system of notation 



loghs ; of its metalls, minerals, freestone, marble, sea-coal, turf and other 

 things that are taken out of the ground. And lastly of the nature and 

 temperature of its air and season, and what diseases it is free from or 

 subject unto ; Conducing to the advancement of navigation, husbandry 

 and other profitable arts and professions. Written by Gerard Boate, late 

 Doctor of Physick to the State in Ireland, and now published by Samuel 

 Hartlib, Esq., for the common good of Ireland, and more especially for 

 the benefit of the Adventurers and Planters there." It was published in 

 London in 1652, and was dedicated to Oliver Cromwell. A French 

 version, under the title of Histoirc Naturelle d'Irlande, was published at 

 Paris in 1666 (Diet. Nat. Biog., sub we. Boate). 



