PREFACE 



in any country in the world have any new or improved techniques 

 that would prove to be of help to their fellow laboratory workers in 

 other countries, I should be very pleased to be given the oppor- 

 tunity of considering such techniques for inclusion in the third 

 edition of this work: I am most anxious that it should be of the 

 greatest possible service to medical and laboratory workers 

 throughout the world and information in any language concerning 

 particular techniques will be welcomed. 



It has been stated in a Netherlands journal in a review, of the 

 first edition of this book, that Gram's Iodine and Lugol's Iodine 

 are identical ; I must correct this misleading statement which was 

 evidently made in error: Gram's Iodine is not identical with 

 Lugol's Iodine; the two formulae are given in this book. 



I should like to express my appreciation of the very energetic 

 co-operation afforded me by my publishers, and the efficient 

 manner in which their production manager, Mr. R. G. Thixton, 

 and the printers Messrs. J. W. Arrowsmith Ltd., have handled the 

 complicated business of getting the second edition into print. 



42, Upper Richmond Road West Edward Gurr 



East Sheen 

 London. 



April, 1955 



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