76 " 
THE YOUNG SCIENTIST. 
vided with a short bailer ; a close fitting 
top with very fine perforations will be 
found to be of great advantage. This 
double can is operated in the following 
manner. 
The perforated can is placed within the 
larger can, Fig. 1, both cans are then filled 
with water, and the animals are placed 
within the perforated can. When reach- 
ing a location where the water can be 
changed, the inner can is quickly lifted 
out and the water is allowed to empty out 
through the perforations till it reaches 
the space at the bottom of the can that is 
not perforated ; here the animals will re- 
main surrounded with sufficient water; 
the larger or outer can is then filled with 
new water, and when this has been ac- 
complished the inner can is placed in 
position, and is immediately filled. In 
this way all handling and consequent in- 
jury to the fish is avoided. The corks at- 
tached to the sides and bottom of the 
inner can are for the purpose of keeping 
it in its position and also to prevent it 
from pressing and jarring against the 
outer can. 
Fig. 3, is a can consisting of heavy sheet 
zinc strengthened at the bottom and at 
the elbow and top with galvanized iron 
bands or hoops, a is a movable hand 
force pump, which is introduced into the 
can through two holes situated at the 
elbow of the can ; the body of the pump is 
passed along the side of the can through 
two loops or rings of zinc n d. The end 
of the pump is perforated at the suction 
end as shown at c. By means of the 
metal hand pump the dead and exhausted 
water at the bottom of the can is con- 
stantly lifted and dashed against the sur- 
face water, thereby thoroughly oxygen- 
ating the water in the can, at the same 
time constant circulation of the water is 
obtained, which is very necessary when 
transporting the young of salmon, trout, 
or black bass. In this can an immense 
quantity of the lower marine and fresh 
water animals can be transported success- 
fully. _________ 
—Iron or steel immersed in a solution 
of carbonate of potash or soda for a few 
minutes will not rust for years. 
The Nautilus and Ammonite. 
[We have frequently had inquiries for the fol- 
lowing poem by the lamented Zgeologist, Kieh- 
ardson. It was printed by Dr. Mantell at the 
close of a small book written by him and entitled 
' Thoughts on a Pebble," but has been but rarely 
reprinted, though it deserves that honor.— 
Ed. Y. S.] 
The Nautilus and the Ammonite 
Were launched in storm and strife ; 
Each sent to float in its tiny boat 
On the wide wild sea of life. 
And each could swim on the ocean's brim, 
And anon its sails could furl ; 
And sink to sleep in the great sea-deep, 
In a palace all of pearl. 
And theirs was bliss more fair than this 
That we feel in a colder clime: 
For they were rife in a tropic life 
In a brighter, happier time. 
They swam mid isles whose summer smiles 
No wintry winds annoy ; 
Whose groves were palm, whose air was balm, 
Whose life was only joy. 
They sailed all day through creek and bay. 
And traversed the ocean deep ; 
And at night they sank on a coral bank, 
In its fairy bowers to sleep. 
And the monsters vast of ages past 
They beheld in their ocean caves ; 
They saw them ride in their power and pride. 
And sink in their deep sea graves. 
Thus hand in hand, from strand to strand. 
They sailed in mirth and glee ; 
Those fairy shells, with their crystal cells. 
Twin creatures of the sea. 
But they came at last to a sea long past ; 
And, as they reached its shore, 
Th' Almighty's breath spake out in death, 
And the Ammonite lived no more. 
So the Nautilus now. in its shelly prow, 
As o'er the deep it strays, 
Still seems to seek, in bay and creek, 
Its companion of other days. 
And thus do we, on life's stormy sea. 
As we roam from shore to shore, 
While tempest-tossed, seek the loved, the lost. 
But find them on earth no more. 
Yet the hope how sweot, again to meet. 
As we look to a distant strand, 
Where heart meets heart, and no more we 
part, 
Who meet in that better land. 
