K. I. A. FROC.-SER. II. 
VOL.1. PLATE XXVIL— SCIENCE. 
Fig. 3. 
V 
Fig. 4.— A, a button regulating the tension of the spring S on the valve V, by screwing up or down 
on the rod B B' attached to the valve V. 
Fig. 5. 
Fig. 5.— S, a thumb-screw, to •■egulate pressure of spring A A on the valve V. 
DR. FURLONG-INSTRUMENT FOR KEEPING UP ARTIFICIAL RESPIRATION. 
