APPENDIX 



Management of the foregoing course of exercises has suggested certain measures and 

 devices economizing time and outlay as well as conducing to the successful performance 

 of the experiments. Mention of some of these may, it is hoped, prove useful to others 

 when arranging exercises of the kind. 



A. GENERAL ARRANGEMENTS 



A class of eighteen students requires nine experiment-places, the students working in 

 pairs. In the equipment with which I have worked seven experiment-places have had 

 operating tables of a modified Brodie pattern, and to five of these places a recording 

 kymograph of one pattern or another has been fitted. Two of the places require merely a 

 plain laboratory table with space at one end for the necessary inductorium and for accessory 

 apparatus and for the preparation (viscus or carcase) at the other, and to these places all 

 that is required in the matter of recording is an ordinary small drum driven by cord or 

 clock-work. By arranging that at each class-meeting different experiments, some requiring 

 recording apparatus and others not, are done at the several experiment-places the above 

 equipment easily suffices. The distribution of different experiments to the several tables 

 for each class-meeting also lessens the labour of preparation for the class. A table when 

 once arranged requires thus no rearrangement for nine successive meetings. A place having 

 been got ready for a particular experiment or small group of experiments, each student pair 

 passes to that table on reaching that exercise in the course. One respiration pump supplied 

 with branching tubing amply suffices for nine experiment-places. One Brodie clock served 

 by a small accumulator similarly suffices for the time-markers at nine places ; the most suitable 

 time unit to give is 2". 



An enamelled iron pail for refuse at side of each experiment table helps to keep the place 

 and room tidy and saves the labour of the servant in cleaning up after the class-meeting. 



The time which has been available for each class-meeting has been ^ hours ; the exercises 

 as arranged in this book are plotted to meet a time-allowance of that duration for each 

 exercise. An accessory advantage accruing to the institution of a mammalian practical class 

 is that it relieves the demonstration com"se of a number of elementary experiments, thus 

 shortening that course, or allowing room in it for other experiments of a more advanced 

 kind. 



No fixation apparatus is required for the preparation, neither is curare. For it ' animal- 

 holders ' in the usual sense of the term are unneeded and unsuitable. The reactions of the 

 carcase, decapitate or decerebrate, do not express themselves as general movements. The 

 preparation remains passive, prone or on its side, in whichever position it be laid, through- 

 out the operation. But it is necessary to give the carcase definite postures suitable for this 

 or that observation. For the supine position the contour of tlie back against the table 

 renders the balance difficult, and to work with it in the supine position the neck-stump may 



