Massachusetts Supreme Judicial Court January 30, 1882 (Perkins v. Stickney)

Endicott, J.

Whether a witness who is called as an expert has the requisite qualifications and knowledge to enable him to testify, is a preliminary question for the court. The decision of this question is conclusive, unless it appears upon the evidence to have been erroneous, or to have been founded upon some error in law. Nunes v. Perry, 113 Mass. 274, 276. Commonwealth v. Sturtivant, 117 Mass.