iiiiMM II iiMiniiiiniiiHriiiiiMiiiniiiiiiiiiMiiiiiiiiiiiiiiiiiiMiiiiiiiiiiMiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiniiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiitiiiiiitiiiiiiiiiitniiiiiiiiiiiiiiiiiiiiiiitiiiiiiniiiii^ 



SCHRIFTEN 



DER 



PHYSIKALISCH-ÖKONOMISCHEN 



GESELLSCHAFT 



zu 



KÖNIGSBERG i. Pr. 



ACHTUNDZWANZIGSTER JAHRGANG. 



1887. 



-^« 



KÖNIGSBERG. 



IN COMMISSION BEI KOCH & REIMER. 



1888. 



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