iQig] RIGG b- THOMPSON— BOG WATER 379 



LITERATURE CITED 



1. Bauman, a., and Gully, E., tJber die freien Humus Saeuren des Hoch- 

 moors. Mitt. K. Bayr. Moorkulturanst. 4:31-56. 1910. 



2. BoTTOMLEY, W. B., The significance of certain food substances for plant 

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 88:237-247. 1914. 



3. CoviLLE, F. v., The agricultural utilization of acid lands by means of 

 acid tolerant crops. Bull. 6. U.S. Dept. Agric. 1913. 



4. Curtis, O. F., Stimulation of root growtji in cuttings by treatment with 

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5. Dachnowski, A., The toxic property of bog water and bog soil. Box. 

 Gaz. 46:130-143. 1908. 



6. , Bull. 16. Geol. Survey Ohio. 1912. 



7. FOULK, C. W., Bull. 16. Geol. Survey Ohio. 191 2. 



8. JODIDI, S. L., Organic nitrogenous compounds in peat soils. Mich. 

 Agric. Coll. Exp. Sta. Tech. Bull. 4. 1909. 



9. Klein, Bied. Centr. 1880, pp. 168-171; rev. Jour. Chem. Soc. London 

 38:738. 1880. 



10. RiGG, G. B., The effect of some Puget Sound bog waters on the root 

 hairs oi Tradescantia. Box. Gaz. 55:314-326. 1913. 



11. , Notes on the flora of some Alaskan sphagnum bogs. Plant 



World 17:167-182. 1914. 



12. , A summary of bog theories. Plant World 19:310-325. 1916. 



13, , The toxicity of bog water. Science II. 48:602. 1916. 



14. , Forest succession and rate of growth in sphagnum bogs. Jour. 



Forestry 15:726-739. 1917; see also Box. Gaz. 65:359-362. 1918. 



15. RiGG, G. B., Trumbull, H. L., and Lincoln, Maxxis, Physical properties 

 of some toxic solutions. Box. Gaz. 61:408-416. 1916. 



16. Robinson, C. S., Organic nitrogenous compounds in peat soils. Mich. 

 Agric. Coll. Exp. Sta. Tech. Bull. 7. 1911. 



17. SCHREINER, O., The organic constituents of soils. Science II. 36:577-587. 

 1912. 



18. ScHROEDER, J., Bicd. Centr. 1879, pp. 634-635; rev. Jour. Chem. Soc. 

 London 38:506. 1880. 



19. Skinner, J. J., and Beaxxie, J. H., Effect of asparagin on absorption and 

 growth in wheat. Bull. Torr. Bot. Club 39:429-437. 1912. 



