Slide as far as you can after the advanced foot has received the weight, and don’t be in a hurry to bring forward the other one.
The body must be swayed slightly from side to side with each step in order to balance it well over the ski which carries the weight.
If you wish to get up the greatest possible speed on the level with two sticks, take three running—not sliding—steps, swinging the sticks forwards with the first two, and, at the third, giving a push with both sticks, followed by a long slide.
Then do the same again, starting with the other foot.
Uphill.—If the gradient is very slight, you can slide straight uphill in just the same way as on the level.
At a rather steeper gradient (the angle depending on the slipperiness of the snow and the skis) you will still be able to move in the same way, but without the extra forward slide after the weight has come on to the advanced ski.
If the slope becomes still steeper you will find that the friction is hardly enough to make the skis hold. The moment you feel they have a tendency to slip backwards as the weight comes on them, walk as upright as possible, even leaning slightly backwards, so as to bring the weight on the heels and throw a little tension on the toe-strap. Shorten your stride, and, instead of sliding the skis along the snow, lift their points six inches or so into the air as you move them forwards (but do not let their heel ends leave the snow), and bring them down again in front of you with a gentle but decided stamp.
In making this stamping movement, take care, as you bring the foot to the ground, to stamp it in a direction exactly at right angles to the surface of the slope. The least suspicion of pawing backwards, or lunging forwards, as the ski touches the snow is sure to make it slip.
By moving steadily and carefully in this way it is possible to walk up an appreciably steeper gradient than the one at which the skis first show a tendency to slip back. But it is no use attempting to struggle or hurry; no amount of effort will help you, and if you cannot do it easily you cannot do it at all.