CHAPTER 15 

 REFERENCES TO THE LITERATURE 



Introduction. The list of references which follows does not 

 claim to be complete and in several directions is intentionally 

 selective. For example, many bacteriological investigations in 

 which the rat has been used are omitted, as are also a large num- 

 ber of descriptive papers belonging to the earlier zoological liter- 

 ature. To this list of omissions belong about a dozen titles 

 which do not appear to be accessible in any of the larger libraries 

 of the United States; the printing of such titles was therefore 

 regarded as superfluous. 



On the other hand, it has been my intention to include the 

 titles of all the papers which record anatomical investiga- 

 tions and physiological studies, so far as these were generally 

 available. 



At the outset of such a plan one meets with the difficulty that 

 the rat has been used in many cases where the fact is not stated 

 in the title of the paper, and moreover in other instances it is 

 only one of several animals which have been examined or tested. 



In the selection of the titles of this class the plan has been to 

 include everything which gave information — no matter how re- 

 stricted — that applied to the rat. Of course it is inevitable under 

 these circumstances that some papers should have been over- 

 looked. 



In accordance with the general plan of the book we have in- 

 cluded papers not only on the wild Norway and the domesti- 

 cated Albino, but also on both forms of the house rat, Mus rattus 

 rattus and Mus rattus alexandrinus. 



The specific names and designations as given by the authors 

 are quoted without comment but can be revised by reference to 

 the foregoing section on nomenclature. Now and then I have 

 permitted myself an annotation when this was pertinent. 



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