16 Trans. Acad. Sci. of St. Louis 



pp. Price 



VOLUME XX 327 $3.50 



No. 1. NiPHER, Francis E., Nature of the electric 



discharge 17 .25 



2. Thompson, Charles Henry, Four new- 

 plants from Mexico 11 .25 



3. Drushel, J. Andrew, Studies in glacial 



geology, St. Lfouis and vicinity 11 .25 



4. Engler, Edmund A., Figurate numbers 23 .25 



5. HuRTER, Julius, Sr., Herpetology of Mis- 

 souri 2ie 2.00 



6. Eau, Phil, Sexual selection experiments "1 



in cecropia moth y 47 25 



Further observations on samia cecropia f 

 Linn J 



VOLUME XXI 97 $3.50 



No. 1. EwiNG, H. E., Origin and significance of 



parasitism in Acarina 70 2.45 



2. Lindsay, George A., Annual rainfall and 

 temperature of U. S 8 .30 



3. Nipher, Francis E., Nature of electrical dis- 

 charge 10 .35 



VOLUME XXII 141 $3.50 



No. 1. Rau, Phil, and Nellie Rau, Biology of 



Stagmomantis Carolina 59 1.50 



2. Nipher, Francis E., Local magnetic storms. 9 .25 



3. Sampson, F. A., Preliminary list of mollusca 



of Missouri 43 1.10 



4. Nipher, Francis E., Variations in the earth's 

 magnetic field 17 .40 



5. Hume, H. Harold, The flowers of Diospyros 



Kaki L 13 .35 



VOLUME XXIII 372 $4.00 



No. 1. Rau, Phil, and Nellie Rau, Longevity in 



Saturniid moths 79 1.00 



2. Klem, Maby J., The history of science in St. 



Louis 51 .40 



3. Trelease, William, The agaveae of Guate- 

 mala 25 .25 



4. Nipher, Francis E., Disturbances on earth's 

 magnetic field 25 .25 



5. Nipher, Francis E., Gravitational repulsion 17 .20 



6. Nipher, Francis E., Graphical algebra, etc. 13 .20 



7. Nipher, Francis E., Graphical algebra 9 .20 



8. Harris, Harry, Birds of the Kansas City 



region* 160 1.00 



9. Nipher, Francis E., Study of properties of 



integral numbers 16 .30 



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