The Hon. Ole Hanson, the ex-mayor of Seattle, who won nation-wide fame by the efficiency and firmness with which he cleaned out the radical element in Seattle, will speak at an open mass meeting to be held this evening at 8 o'clock in the Scenic Temple Theatre at Central Square under the auspices of the Cambridge Board of Trade.

Mr. Hanson, who has been making a study of the immigration problem in this country, proposes as a remedy to our present unsatisfactory immigration system immigration by selection. Under his plan no immigrant would be permitted to come to this country without a thorough physical, mental and economic examination in his own country.

This plan, Mr. Hanson believes, would do away with the menace of the foreign colonies which exist in so many parts of the United States and which operate so efficiently to prevent immigrants from learning Americanization and from becoming loyal citizens.

Another feature of the fighting mayor's campaign for Americanization is his plea for the teacher. In the school teacher he sees the keystone of the arch of Americanization. As a result he demands of his audience that they consider the standing of the teacher.