mo 



''Tlio <lmiO!*s oftlio soiisou londcrs tlio a«lv:mtaii:«^s of n solnblo I'onn 

 of phosphoric acid very striking. The experiment will ln' rei»eat<'<l <lin 

 iug the coining season." 



ExjU'rinients irifh fjrass laittl (pp. 102-108'). — An acconnt is given ol 

 the improvement of a low. s]»ringy meadow by nndenlraining and seed 

 ing down with grass mixtnres, and a report of the snbscipient niannrinu 

 of the laud and the yields of hay from i>ortii>ns receiving <lilVereut treat 

 ment in ISSO and 1800. 



From " an unsightly, swampy nunidow, covered with a comparatively 

 worthless vegetation," the land lias been brought up in 4 or ~» years to 

 a yield of from '^ to 4j| tons of go«id hay i)er acre. 



General farm irork (p. 100). — Ivcmarks regarding the current farm 

 work. "A new orchard, covering an area of from to 7 acres, has been 

 in part planted with ai)ple, pear, peach, and ])lum trees: otlur varieties, 

 as well as small fruits, will be ]>lant«Ml during the coming spring." 



JiKTOKT OF VKUKTAULK PATHOLOGIST, ,1. E. lllMPHKEY, B. S. 



(pp. 200-22(5, plates 2). — This includes notes on the black knot of the 

 plum, cucumber mildew, brtnvn rot of stone fruits, potato scab, and 

 various other jilant (lis«'ases. 



JUaek knot of ihe plnm (pp. 200-210). — Brief account of the history of 

 investigations of black knot of thejdum (Ploirrijihtia morhoso). and i»re- 

 liminary notes on o1>servations by the author on the s]>or«' forms <dthis 

 disease. A ])ycnidial Ibrm not ]>reviously observed is described and 

 illustrated. Of the four kinds of si>ore fruits described by Dr. Farlow. 

 the autluu- has observed those ])roducing ascosixnes and what seem to 

 be second forms «)f pycniilia. The s])ermogonia and stylospores [Hen- 

 (fer-sonnla niorhosa. Sacc.) have not been found as yet. 



Ctirnniher mildew (21l>-2]2). — The form of cucund)er ndldew first 

 oKserved in this country in 18S0. and hitherto known as I'cronospora 

 eiihen.sis. was found on cui-nmbers and squashes in ]\rassachusetts in 

 1S!>0. This species and P. anstrolis. found on the wild stai" cu( iniib( i. 

 are toin]»ared and illustrated. The haustoria of lH>th sjx-cii's are of the 

 small, knoblike type. Those (»f 7'. (■»//r».v/\are scattered over the yellow 

 and dead-looking spots on the leaf and "do not form a «'lose felt, visible 

 to the naked eye." P. anstralis. on the contrary, forms dense whit«' 

 tufts, of small extent, on the leaves of the star cucumber. The strn«'- 

 ture of the spore-bearing threads in the two s]>ecies is strikingly difVei- 

 ent. 



t'<Mr«'l;itod with the (l(>v(>lo]im«M)t ot' small liausfi^ria is fiCfpitMitly foniiil, as in tbo 

 graiu'vine mihlew ami in P. niistniUa, a )>innatc lirancliing (»f tho ronidial (liroails. 

 an«l conidia witb an apical papilla, whicb jrorminate hy prodnoini; zoospmvs instead 

 of a tnbe. In P. ciihcnsis \\v ]iav»^ tli«> anomaly of conidial tlirends wliicli follow the 

 type of hranohinj; nsnally seen in the species with Itrnnched hanstoria. and eouidia 

 of a violet tint, snch as are almost nnknown except among the latter jjronp. while 

 the hanstoria are small and the eoni<lia liav«> the a])ical pa])illa andjiri»dncezoos]>on'8 

 on germination. This species goes far to break down the distinctions held by some 

 writers to exist between tin- twt> gronps %\liich const it ntc the gcn«>ra riiisniojuira nuil 



