The instrument here represented is due to M. Marmuse, maker of horticultural implements.

Its object is to obviate the necessity of using two instruments alternately, according to the parts needing attention in the tops of trees.

The trimmer and pruning-knife is composed principally of two arms; the larger and longer one shows the common pruning-knife, but differs from it in the back being sharp; the other is smaller, more slender, and shows the edge of the clipper. By the play of the instrument, the object placed between the two arms is easily cut; the smaller one works upon the larger without passing by the sharp back placed on the outside edge, which would make it dangerous to use.

In becoming accustomed to this instrument of M. Marmuse, when ready to pass from the operation of the clipper to make use of the pruning-knife, it is only necessary to turn a screw situated at the lower end of the handle. By this movement, the handle of the clipper flies from the groove by the aid of a spring which is fastened on this handle, and presses against the handle of the pruning-knife. These two parts are thus separated, and the two blades are opened.

Even very strong branches are easily cut by this instrument. As to the pruning-knife, it does not seem to us of the most convenient shape.

Experience has proved that much of a curve in the pruning-knife is entirely useless, and even annoying on this account, that only the weakest part of it can be used.

The curve of the pruning-knife of M. Marmuse needs then to be materially modified, in order that the instrument may be adapted to the service we expect from it. - Leon Gouab, in Revue Horticole.