X PREFACE. 



The bibliographer will feel especial interest in the 

 long account given of Hartlib's numerous publications, 

 which, however imperfect, is the most complete list 

 that has yet been published. 



Among the works mentioned will be found the one en- 

 titled " An Invention of Engines of Motion/^ reprinted 

 at the end of the present work. Of this very scarce 

 pamphlet there are two copies in the British Museum, 

 and its present editor has presented his own copy to the 

 Library of the Eoyal Society. Dr. Vaughan, in his 

 ^^Protectorate of Oliver Cromwell/' 1838, gives the 

 Rev. Dr. John Pell's letter of 27th May, 1658, in which 

 mention is made of Mr. Dymock; and in vol. 2, page 467, 

 there is Mr. Dymock's report on the invention of an 

 invalid's bed. 



Whether for the man of letters or of science, the 

 politician or the theologian, the historian or the bio- 

 grapher, the Hfe of a man like Samuel Hartlib has 

 many rare claims on human intelligence, sympathy, and 

 respect. And whatever may be the failings of the 

 present epitome of Hartlib's immeasurable labours and 

 intellectual efforts, it is with some degree of confidence 

 that the author appeals to the many important facts 

 adduced as alone sufficiently affording abundant life-like 

 characteristics of the subject of the present memoir. 



H. D. 



