PREFACE. 



IN the new edition of the Syllabus of my Lectures on 

 Physiology, I have followed the same arrangement as in 

 the last, with the exception that in the chemical part the 

 descriptions of immediate principles, which were before 

 printed separately, have now been incorporated in the 

 text. The whole has been revised, and some parts have 

 been much extended. Under the title " Practical Exer- 

 cises," I have added to the Syllabus instructions for labo- 

 ratory work relating to the chemical properties of the 

 animal liquids, and of the most important foodstuffs ; and 

 to the physiological endowments of living tissues and 

 organs. The experiments I have selected are of so simple 

 a character that, with the directions given and such aid 

 as he will readily obtain in the laboratory, every man who 

 takes pains will find it easy to carry them out successfully. 

 The chemical series already form part of the Course of 

 Practical Physiology. The others, which relate chiefly to 

 the properties of the excitable and contractile tissues, have 

 been hitherto omitted ; not because they are regarded as 

 of less importance, but for want of space a difficulty 

 which will be removed as soon as our new laboratories are 

 completed. I cannot too strongly recommend their use 

 to all who desire to acquire a serviceable knowledge of 

 the elementary facts of physiology. They will also fulfil 

 another but less important purpose, that of aiding candi- 



