Adjusted gross income, or AGI, is a person's total taxable income minus allowable tax deductions and personal exemptions. Taxable income includes all wages, salaries, tips, dividend and interest income and capital gains. These incomes comprise the Income portion of many IRS tax-return forms, including Form 1040A.
An H-style cap (cowl) is a chimney top constructed from chimney pipes shaped like the letter H. (Its image is included in cowl (chimney).) It is an age-old method of regulating draft in situations where prevailing winds or turbulences cause downdraft and backpuffing.
The name comes from the Medieval Latin word gamba, meaning horse's hock or leg. The term gambrel is of American origin, the older, European name being a curb roof. Europeans historically did not distinguish between a gambrel roof and a mansard roof but called both types a mansard.