No. 1, August, 1920] TAXONOMY OF VASCULAR PLANTS 141 



lytic action than copper sulfate and perhaps the digestion in the case of copper should be more 

 prolonged than with mercury. The use of sodium sulfate in the place of potassium sulfate 

 in the Gunning method and its modifications is to be studied. — F. M. Scherlz. 



1004. Fippin, Elmer O. The truefast test for sour soil. Jour. Amer. Soc. Agron. 12: 

 65-68. 1920. — The paper describes the chemical principles employed by the truefast test 

 and points out the special features of the outfit. The manner of using the outfit is given. — 

 F. M. Schertz. 



t 



1005. Frear, Willham, Walter Thomas, and II. D. Edmiston'. Notes on the use of 

 potassium permanganate in determining nitrogen by the Kjeldahl method. Jour. Assoc. Official 

 Chem. 3: 220-224. 1919.— Results of the authors show that for the fertilizer mixtures repre- 

 sented the addition of permanganate caused a distinct loss of nitrogen. The loss depended 

 somewhat upon the amount of permanganate but chiefly upon the time of the addition. If 

 the addition was delayed for two minutes after removal from the flame no loss in nitrogen 

 was observed. — F. M. Schertz. 



1006. Phelps, I. K., and H. W. Daudt. Investigations of the Kjeldahl method for the 

 determination of nitrogen. Jour. Assoc. Official Agric. Chem. 3 : 218-220. 1919. — The hydrol- 

 ysis of certain organic compounds of various constitutions was studied. In the presence of 

 0.7 gram of mercuric oxide, 10 grams of K 2 SO< and 25 cc. of H 2 S0 4 , weights of the compound 

 varying from 0.2 to 0.4 gram were hydrolyzed completely by 2.5 hours of boiling. — F. M . 

 Schertz. 



1007. Trowbridge, P. F. Symposium on the determination of nitrogen in fertilizers. 

 Jour. Assoc. Official Agric. Chem. 3: 217-218. 1919. — The paper gives the answers of 3S sta- 

 tion chemists and 17 commercial chemists, to a questionnaire on methods of determining nitro- 

 gen in fertdizers. Twenty-one chemists use a gram sample. Either mercury oxide or mercury 

 is used by 41. Thirty-two do not use potassium permanganate at the close of the digestion. 

 Sulphuric acid as standard is used by 31 chemists and 2S use sodium hydroxide to titrate the 

 excess of acid. Cochineal is used as indicator by 42 chemists. Others use methyl red, methyl 

 orange, congo red, sodium alizarin sulphonate, alizarin red and lacmoid. NH 4 OH was com- 

 pared with NaOH for titrating and out of 203 samples of fertilizer analyzed at different times 

 105 samples gave 0.01 per cent higher results with NaOH. — F. M. Schertz. 



TAXONOMY OF VASCULAR PLANTS 



J. M. Greenman, Editor 

 E. B. Payson, Assistant Editor 



SPERMATOPHYTES 



1008. Aellen, Paul. Neue Bastardkombinationen im Genus Chenopodium. (New 

 Hybrid-combinations in the genus Chenopodium.] Rep. Sp. Nov. 15: 177-179. 1918. [Rep. 

 Eu. & Med. 1: 257-259.] — The following new hybrid-combinations and new varieties are 

 published: X Chenopodium leptophylliforme (C. album X leptophyllum) , X C. leptophylliforme 

 Aellen var. glabrum,X C. pseudoleptophyllum (C. hircinum X leptophyllum) and X C. Bin- 

 zianumv&r. obtusum, X C. basileense[(C. hircinum X striatum) X album=C. HaywardiaeX 

 album]. — E. B. Payson. 



1009. Arthur, J. C. New names for species of Phanerogams. Torreya 19: 48-49. 1919. 

 — In listing the hosts of Uredinales for the North American Flora, the author makes the 

 following new combinations: Seniles Harlwegi (Zeugites Hartwegi Fourn.), Sanguinale pru- 

 riens Trin. {Panicum pruriens Trin.), [Corrected (Torreya 19: S3. 1919) to read Syntherisma 



