30 THE MICROSCOPE. Feb. 
REGENT PUBLICA TEO NS. 
Biological Work.—Dr. H. B. Ward has published the 
Sixth Bulletin of the Michigan Fish Commission. It con- 
tains the records of work done by Dr. Ward and by five 
others. Aquatic Plants are treated by H. D. Thompson, 
the Protozoa by Dr. C. A. Kofoid, the Rotifera by H. 5S. 
Jennings, the Turbellaria by Dr. W. McM. Woodworth 
and the Molusca by Bryant Walker, the object of the work 
is the study of the life of Lake Michigan in all its manifold 
relations, but especially in those relations which bear upon 
the welfare of the food fishes. 
Microscopy for the Farmer.— Among the recent contri- 
butions to botanical literature is a work-(Maladies des 
Plantes Agricoles et des Arbres fruitiers et Forestiers 
causees par des parasites vegetaux. Paris, 1895,) on the 
diseases of agricultural plants including forest and fruit 
trees. 
In his introduction the author speaks of the changes 
made in the methods of viewing plant diseases. And in 
speaking of the aimsand purposes of the work he says: 
“Tf Tam able to render the study interesting and intelli- 
gible to agriculturists and to all persons living in the 
country and who have received some general knowledge 
of the structure of plants I shall have obtained the end I 
had in view.” 
Of the difficulties of studying minutes parasitic plants 
headds: ‘It seems to be established that such researches 
present too many difficulties to be carried on by any one 
who wishes to do so. My greatest desire is to dissipate 
this belief and to facilitate the beginnings of observers 
who, living in the country, are able to test on cultivated 
plants the facts already observed and described and to 
examine the parasites in all the stagesof theirdevelopment. | 
If they acquire a taste for these researches they may be 
able in their turn to add many new facts to science.”’ 
