949.

L. M. P.--(1) Keep her full head-on at half power, taking advantage of
the lulls to speed up and creep into it. She will strain much less this
way than in quartering across a gale. (2) Nothing is to be gained by
reversing into a following gale, and there is always risk of a turnover.
(3) The formulae for stun'sle brakes are uniformly unreliable, and will
continue to be so as long as air is compressible.

PEGAMOID--(1) Personally we prefer glass or flux compounds to any other
material for winter work nose-caps as being absolutely non-hygroscopic.
(2) We cannot recommend any particular make.

PULMONAR--(1) For the symptoms you describe, try the Gobi Desert
Sanatoria. The low levels of most of the Saharan Sanatoria are against
them except at the outset of the disease. (2) We do not recommend
boarding-houses or hotels in this column.

BEGINNER--On still days the air above a large inhabited city being
slightly warmer--i.e., thinner--than the atmosphere of the surrounding
country, a plane drops a little on entering the rarefied area, precisely
as a ship sinks a little in fresh water. Hence the phenomena of "jolt"
and your "inexplicable collisions" with factory chimneys. In air, as on
earth, it is safest to fly high.

EMERGENCY--There is only one rule of the road in air, earth, and water.
Do you want the firmament to yourself?

PICCIOLA--Both Poles have been overdone in Art and Literature. Leave
them to Science for the next twenty years. You did not send a stamp with
your verses.

NORTH NIGERIA--The Mark Boat was within her right in warning you off the
Reserve. The shadow of a low-flying dirigible scares the game. You can
buy all the photos you need at Sokoto.

NEW ERA--It is not etiquette to overcross an A. B. C. official's boat
without asking permission. He is one of the body responsible for the
planet's traffic, and for that reason must not be interfered with. You,
presumably, are out on your own business or pleasure, and must leave him
alone. For humanity's sake don't try to be "democratic."

EXCORIATED--All inflators chafe sooner or later. You must go on till
your skin hardens by practice. Meantime vaseline.

REVIEW

The Life of Xavier Lavalle
(Reviewed by Rene Talland. Ecole Aeronautique, Paris)

Ten years ago Lavalle, "that imperturbable dreamer of the heavens,"
as Lazareff hailed him, gathered together the fruits of a lifetime's
labour, and gave it, with well-jus