The selectmen of towns, or assessors of cities, may include in one assessment the state, county, town or city, highway, schoolhouse, school or village district and school taxes, or so many of them as may be found convenient.
RSA 76:4
RS 43:5. CS 45:5. GS 53:5. 1871, 9:2. GL 57:5. PS 59:4. PL 64 :4. RL 77:4.