UaRIIKK and TkACHK: I'NKllMtlNli; I'LAODK.] 



[Phil. Jhukn. Sn., VII. B, No. 3. 



Fig. 1. The Mukden mask. A. The many-tailed bandage to hold the pad securely in place. 

 B. The cotton pad wrapped in gauze. 



Fig. 2. Two subjects wearing the modified Broquet mask and the Mukden mask, respectively, 

 ready for exposure to the sprayed bacilli. 



PLATE V. MASKS FOR PROTECTION AGAINST PNEUMONIC PLAGUE. 



