of the Rose-slug is a solution of whale-oil soap. The first use of 
this cheap and effective article, now extensively used to destroy a 
variety of insects, was made many years ago by Mr. David Hag- 
gerston, of Watertown, Mass., as stated by Dr. Harris, in his 
Treatise, when speaking of the insect now under consideration. 
Mr. Haggerston used it of the strength of two pounds of the soap 
to fifteen gallons of water. The Hon. Lewis Ellsworth, proprie¬ 
tor of the Haperville nursery, and his son, who make the cultiva¬ 
tion of roses a specialty, informed me that they find this article to 
be all sufficient for the purpose of destroying the Rose-slug in 
their green-houses and elsewhere, and that they do not find it ne¬ 
cessary to use more than one pound to fifteen gallons of water. 
A.& it is a very coarse and disagreeably smelling article, it is of 
course desirable to use as weak a solution as can be without im¬ 
pairing its effect. It is applied with a water-pot or a garden 
3 yringe. The whale-oil soap being so effectual, it is not necessary 
to resort to other applications.. 
I will take this opportunity to state, however, that I have ex¬ 
perimented with the carbolic acid about which so much has been 
said as an insect destroyer, by mixing, first, one ounce of the pure 
mid to one gallon of water, and afterwards two ounces to the gal¬ 
lon, and applying it to the Rose-slug and to the equally tender 
slug of the Rear-leaf, but with very unsatisfactory results. It ap¬ 
pears from my diary, kept at the time, that the Rose-slugs were 
anly driven temporarily from the leaves, but not killed, even by 
:he stronger solution, and that the Pear-slugs having been dipped 
nto it with the leaves to which they were attached, were found 
;he next day feeding upon the same leaves, unharmed. It is 
probably more effectual in the form of carbolic acid soap, but 
whether this is any better than the cheaper whale-oil soap, I am 
unable to sav, from any experience of my own. 
There are two broods of these insects in a season; the first usu¬ 
ally making their appearance early in June, and the other in Au¬ 
gust. But if the former be pretty thoroughly exterminated, there 
will be little to fear from the late brood. 
I hope that the dissemination of this report may prove instru¬ 
mental in calling attention to this subject, and in saving from ut¬ 
ter destruction this favorite flower. If it should be permitted me, 
when another June calls the roses to blossom, to revisit the beau- 
Yol. 11—43 
