Sec. 34. Theory of contract at •common law.

Sec. 35. Classification of contracts at common law.

Sec. 36. Origin of general theory of contract.

Sec. 37. General nature of obligation.

Sec. 38. Parties to obligation.

Sec. 39. Definite character of acts involved in obligation.

Sec. 40. Money value of obligation.

Sec. 41. Obligation arising out of agreement as contract,

Sec. 42. Promissory character of agreement.

Sec. 43. Community of intention.

Sec. 44. Intent to affect legal relations of parties thereto.

Sec. 45. Methods of entering into agreement.

Sec. 46. Effect of modern theory on common law classification.

Sec. 47. Quasi-contract.

Sec. 48. Classification and arrangement of topics.