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.
If you itemize your federal deductions on Schedule A, charitable donations are tax-deductible -- the charitable donation deduction is one of the few that you can claim if you're subject to the Alternative Minimum Tax.