| ($ in thousands) | 2008 | 2007 |
| Assets | ||
| Cash and cash equivalents | $188,264 | $180,827 |
| Operating investments, at market | 178,251 | 217,077 |
| Collateral held for securities lending | 103,656 | 19,863 |
| Accounts receivable, net | 264,513 | 251,784 |
| Inventories, prepaid expenses and deferred charges | 53,968 | 56,429 |
| Contributions receivable, net | 45,119 | 33,645 |
| Notes receivable, net | 19,561 | 18,556 |
| Other assets | 12,740 | 14,530 |
| Investments held for long-term purposes | 1,881,683 | 1,989,875 |
| Property, plant and equipment, net | 1,315,340 | 1,203,203 |
| Interest in net assets of foundation | 16,859 | 18,553 |
| Investments in perpetual trusts held by others | 51,324 | 57,823 |
| Total Assets | $4,131,278 | $4,062,165 |
| Liabilities and Net Assets | ||
| Liabilities: | ||
| Accounts payable and accrued expenses | $283,092 | $231,698 |
| Advance receipt of sponsored research revenues | 30,811 | 29,636 |
| Deferred revenue | 53,100 | 50,757 |
| Third-party settlements payable, net | 54,022 | 68,459 |
| Securities lending liabilities | 103,656 | 19,863 |
| Accrued pension, postretirement, postemployment obligations | 191,205 | 186,154 |
| Long-term debt | 682,974 | 708,542 |
| Asset retirement obligation | 16,999 | 17,349 |
| Refundable U.S. Government grants for student loans | 15,870 | 15,818 |
| Total Liabilities | 1,431,729 | 1,328,276 |
| Net assets: | ||
| Unrestricted | 2,159,147 | 2,209,589 |
| Temporarily restricted | 242,367 | 247,546 |
| Permanently restricted | 298,035 | 276,754 |
| Total Net Assets | 2,699,549 | 2,733,889 |
| Total Liabilities and Net Assets | $4,131,278 | $4,062,165 |