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20286 



Perkins, JTanet]. Fragmenta florae 

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. . . Preliminary studies 



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Perredes, Pierre E[lie] F[elix]. Com- 

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 63, 1903, (226-229, 39 figk). [2500 

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Perriraz, P. Un hybride d'AmygdaJus 

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20290 



Tableaux destines a I'en- 



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Perronne, P. La seve d'aout. Lille, 

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Pertz, D[orothea] F[rances] M[atilda]. 

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r. Darwin, F. 



Perwo, E. R. Die Vegetation des 

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 12). [8000 c/c]. ^ 20294 



Petch, T. Mycetozoa in the Scar- 

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Peterfi, Alarton. Nehany adat a Kau- 

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20206 



Peterfi, Marton. Astomum inter- 

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Magy a rorsz ag tozeginohai . 



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Beiti 



Kenntnis der 



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20299 



Peters, Friedrich. Pharmakologische 

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20300 



Peters, L. v. Hiltner, L[orenz]. 



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 Kjobenhavn, Det forstlige Forsogsvsesen, 

 1, 1904, (49-68). 24i cm. [2040 

 4150 4250]. " 20301 



Overvoksning eftcr L^engde- 



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 Kjolj^nhavn, Vid. Selsk. Overs., 1903, 

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Undersogelser over Trre- 



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20303 



■ Martin Vahl. In Bricka : 



Dansk Biografisk Lexikon, Kjobenhavn, 

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Petersen, Sev[erin] r. Eostrup, E. 



Pethybridge, G. H. An improved 

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Petit, Paul. Action de la chaleur et 

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 Acad, sci., 138, 1904, (1231-1233). 

 [3120]. 20306 



■ — Catalogue des Diatomees 



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 ass. fran^. avanc. sci., 31, (Montauban, 

 1902), 2'^ partie, 1903, (590-599). [7400 

 8000 fh]. ^ 20307 



