THE AMERICAN-SC AN DIN AVI AN REVIEW 
109 
Up to the present time the invention has shown such great sensi¬ 
tiveness that a great many undesired sounds, such as the whistle of the 
wind, the barking of distant dogs, the blows of a hammer from some 
neighboring workshop, have been caught, but one can of course try 
to isolate the sounds one wants taken up, and this sensitiveness is in 
itself a great advantage. The apparatus has been able to catch up and 
record upon the film sounds of heart and lung which cannot be perceived 
by the stethoscope, and this in conjunction with the absolute syn¬ 
chronism between sound and motion, gives it great scientific possi¬ 
bilities. Of course, it can also be used for purposes of amusement, 
although it is not likely that it will ever be any great rival of the film, 
since it cannot in the same degree as the latter become international. 
However that may be, this forward step by a Swedish engineer has been 
greeted with joy, and a company has already been formed for the 
exploitation of the invention. 
The Norse Immigration Centennial 
By H. B. Kildahl 
Mention has been made in the Norwegian-American press of a 
centennial celebration to be held in 1925 to commemorate the advent of 
the Norsemen to this country. Preparations are being made by certain 
“bygdelags” to commemorate the event, but it appears that these plans 
are confined to local celebrations among the Norse groups of the Ameri¬ 
can people. It seems to me, however, that an event so significant to 
our country should be made to assume a greater scope than is appar¬ 
ently being planned. 
We all know that Cleng Peerson came to America in 1821, and 
that Norse immigration began in earnest in 1825. We also know some¬ 
thing about the significance of this immigration both to the immigrants 
and to our country. We have heard so much about our indebtedness 
to our country, but little has been said about our country’s indebtedness 
to us. We know these things and we can speak and write about them in 
the Norwegian-American press and pat each other on the shoulder, 
but nothing more comes of it. 
Apparently the average American knows very little or has a very 
erroneous information about this important chapter of his country’s his¬ 
tory, and therefore a celebration such as the one under discussion should 
be planned on a large scale by which the full significance of the advent 
of the Norsemen would be brought home to the knowledge of the Amer¬ 
ican people who are not of Norse extraction. 
In the first place, a large committee consisting of men and women 
