As a result of two years' experimenting I can say that we spray Winter 
the roses late in the Fall, before earthing up, with Bordeaux, to which Protec- 
we add plenty of Paris green (8 oz. to 50 gal.), having previously given tion 
the whole garden a thick coat of lime. We find that this has saved our 
roses from the ravages of mice during the Winter. That mice were 
there was proved both years by a few attacks, but only two or three 
in each case. The last two Springs we found so much of the late 
Fall Bordeaux still adhering to the plants that we did not judge it 
necessary to give them the regular Spring spray. 
It is consoUng, in view of the ever-increasing difficulty of obtain- 
ing manure, to know that during this last very bitter Winter our roses 
were protected only by the earthing up and with sedge. Formerly 
we used manure and leaves. The roses we lost were in most cases 
either particularly delicate varieties or old plants which had lost 
their vitaHty through years of insufficient pruning. I think the use of 
leaves encourages mice in the building of nests, even when they are 
put on very late. 
All our climbers are strawed up for the Winter except the very 
hardiest. 
Climbing roses on a house are inadvisable because there is not 
enough circulation of air to keep away bugs and mildew and because 
the necessary sprayings injure the building, and, by the way, Ham- 
mond's Grape Dust is excellent for mildew on roses. But if the case is 
severe one must resort to Bordeaux which unfortunately soils every- 
thing, or else the ammoniacal copper carbonate which has to be 
renewed more frequently but does not show so much. 
At Mr. McFarland's request I sent him a hst of the climbers we New 
have been trying out here, also a Hst of the garden roses recently Roses 
planted here and which have done well. These Hsts were pubHshed in 
the 1920 Rose Annual. 
We have the privilege of showing you the result of some most 
interesting work of Professor E. H. Wilson of the Arnold Arboretimi 
in tracing back the famihes and derivatives of our modern garden 
roses. He sent the map, which is extremely detailed, to my daughter 
and with his permission she has condensed it as you see. 
The work of the hybridizer has consisted in selecting the varieties 
which he thought would produce the results he sought and making 
the crosses according to his judgment, also in selecting a strong stock 
on which to bud the more deHcate varieties produced by his crosses, 
the stock giving them its own strength. The main stocks in use are 
Manetti and Rosa Canina. Manetti suckers badly. Its foliage is 
sometimes hard to distinguish from that of the regular roses but it has 
seven leaflets and is very thorny and of dense growth. At least one 
American grower is trying out Rosa Rugosa as a stock. 
