1890 - 91 .] Prince of Monaco on Ship for Study of the Sea. 301 
knots per hour; the second, along with the first, gives a speed of 
nine knots. Thus the ship can be economically steamed slowly while 
work is being carried on, and she can also be worked under sail 
when the wind permits. 
The products of the scientific work are distributed amongst three 
laboratories, as follows : — 
The materials as collected are received in a laboratory situated on 
deck abaft the mainmast, and communicating by a lift with the 
central laboratory immediately below, and the lift descends as far as 
the cold chamber in the hold. After a first picking over, for the 
elimination of useless matter, the zoological material is sent to the 
central laboratory, and the oceanographical material to a third labora- 
tory in the after part of the ship, which is devoted to chemistry and 
physics. These laboratories are lighted by large scuttle lights , and 
the arrangement of the tables allows of four or five persons working 
at each of them without interfering with one another. Like the 
rest of the ship, they are heated by steam on a special system. As 
to the general service of the ship,- it is arranged according to what 
modern progress has recognised as most useful and most practical. 
I do not think that one ought to carry too far an analysis or 
other delicate observations during the voyage. The movement and 
the noise, however subdued they may be, are a cause of constant 
disturbance ; on the other hand, one would have to have exceptional 
power over one’s mind, to be able to arrest it in the exciting moments 
of a general investigation, whilst other experiments, of an engrossing 
character, were being carried on without interruption, on the largest 
scale and with full power of the ship. 
To follow out under these conditions any profound idea does not 
seem to me to be an easy matter, and I think that it ought to be 
one’s chief object, during the work at sea, to make the best arrange- 
ments for collecting a great number of facts at the most favourable 
moments, and for noting all the details which strike the eye and 
the mind. It is thus that a painter makes a study from nature, 
which afterwards becomes a masterpiece, when the impressions he 
has received have matured in the silence of the studio. 
And now I regret that I must terminate this communication to 
the Royal Society very differently from what was originally my 
intention, viz., without being able to invite you to visit the 
