INTRODUCTION. 



HAT the Reader is to exped: in this EfTay, 

 § will perhaps be learned, with moft Satis- 

 fadion, from the following Account, of the 

 Author's Inducements to engage in fach 

 Difquifitions, the Difficulties that attended 

 them, and the various Succefs. 



In the Autumn of the Year 1751, I received a curious 

 Colledion of Sea-plants and Corallines from the Jfland of 

 Anglefey^ in North Wales^ and another from Dublin, In 

 order to preferve fome Specimens of the moft rare Kinds, 

 particularly thofe that were remarkable for their Colours, I 

 expanded them on Paper in frefh Water, laying out their 

 fine Ramifications with fome Exadnefs ; for which Method, 

 with many ufeful Hints in Botany, 1 am indebted to that 

 excellent Botanift Mr. Buttner^ of Berlin. 



Thefe, when properly dried, I difpofed on thin Boards 

 covered with clean white Paper, in fuch a manner as to 



form 



