10 Trans. Acad Sci. of St. Louis 



pp. Price 



NiPHER, Francis E., Surface integrals in me- 

 teorology. 



LuEDEKiNG, C, On the analysis of the barium 

 group. 



Hitchcock, A. S., Catalogue of the Anthophyta 

 and Pteridophyta of Ames, Iowa. 

 DuFFEY, J. C, Transformations of a Cara- 

 bid, etc. 



Pammel, L. H., On the seed-coats of the genus 

 Euphorbia. 



Robertson, Charles, Flowers and insects, 

 Asclepiadaceae to Sorophulariaceae. 

 Pritchett, H. S., a formula for predicting the 

 population of the United States. 

 Pritchett, H. S., Observations of the transit 

 of Mercury, May 9, 1891. 



Vodges, a. "W., On some new Sedalia trilobites. 

 Nipher, Francis E., On certain properties of a 

 field of force due to a single mass, 



VOLUME VI 547 $7.00 



No. 1. Webber, H. J., Appendix to catalogue of 



flora of Nebr 48 .25 



2. Engler, Edmund A., A geometrical con- 

 struction for finding the foci o£ the sections 



of a cone of revolution 9 .25 



■ 3. WiNSLOw, Arthur, The mapping of Missouri 45 .75 



4. Robertson, Charles, Flowers and insects — 

 Labiatae 33 .50 



5. Hitchcock, A. S., The opening of the buds 



of some woody plants 19 .50 



6. Bay, J. Christian, Materials for a mono- 

 graph on inuline 12 .25 



7. Porter, W. Townsend, The physical basis of 

 precocity and dullness 22 .50 



8. Engler, Edmund A., Geometrical construc- 

 tion for cutting from a cone of revolution 



plane sections 9 .25 



9. Pammel, L. IL, Sclerotinia Libertiama, 

 Fuckel, with a bibliography of fungus root 



diseases 43 .75 



10. Porter, Wm. Townsend, The relation be- 

 tween the growth of children and their devia- 

 tion from physical type of their sex and age 19 .25 



11. HuRTER, Julius, Catalogue of reptiles and 

 batrachians found in vicinity of St. Louis, 



Mo. 13 .25 



12. Porter, Wm. Townsend, The growth of St. 



Louis children 165 1.00 



13. OLATFEiyrER, N. M., Study of Salix nigra and 



S. amygdaloides with hybrids 9 .50 



