haversian spaces-spaces in bone formed by the enlargement of haversian canals. haversian system-a central canal containing capillaries and the concentric osseous lamellae around it occurring in compact bone.
Any donation to a political party, campaign, or action committee is non-deductible. Other non-deductible contributions are those to individual people, labor unions, business associations, for-profit schools, for-profit hospitals, foreign governments, and fees paid to associations or state or municipal governments.
A charitable deduction, generally, may only be taken on donation amounts greater than value received, so raffle ticket purchases are not deductible as charitable gifts. See the table on page 2 of IRS Publication 526. Entry fees to participate in games of chance are also not deductible as charitable contributions. The IRS considers the chance to win a prize to be something of value received in exchange for a donation. Source(s):