Sec. 70. Agreement essential element of contract.

Sec. 71. Motives or benefits as substitute for agreement.

Sec. 72. Custom as substitute for agreement.

Sec. 73. Actual intent or standardized intent.

Sec. 74. Offer and acceptance.

Sec. 75. Nature of offer - Must purport creation of legal liability.

Sec. 76. Promissory character of offer - Declarations of fact.

Sec. 77. Declarations of intention.

Sec. 78. Declarations of desire or hope. Sec. 79. Intent to assume liability. Sec. 80. Offers in jest. Sec. 81. Offers under mental agitation. Sec. 82. Simulated or sham offers. Sec. 83. Undisclosed terms and mental reservations. Sec. 84. Information or invitation to negotiate. Sec. 85. Illustrations of offers to negotiate. Sec. 86. Illustrations of offers contemplating legal liability. Sec. 87. Necessity of complete terms. Sec. 88. Incomplete terms. Sec. 89. Terms to be settled by future negotiations. Sec. 90. Terms to be settled at election of one party.

Sec. 91. Terms supplied by specific extrinsic reference.

Sec. 92. Terms supplied by implication of law. Sec. 93. Terms supplied by construction.

Sec. 94. Method for determining terms omitted from contract.

Sec. 95. Indefinite and uncertain offers.

Sec. 96. Uncertainty as to consideration.

Sec. 97. Uncertainty as to subject-matter.

Sec. 98. Uncertainty as to time.

Sec. 99. Requisite degree of certainty. Sec. 100. Context and surrounding facts. Sec. 101. Terms made certain by specific extrinsic reference. Sec. 102. Terms made certain by principles of construction. Sec. 103. Effect of performance of indefinite covenant. Sec. 104. Effect of waiver of indefinite covenant. Sec. 105. Effect of indefinite covenant upon contract.

Sec. 106. Uncertainty in equity and at law.

Sec. 107. Quasi-contractual right of recovery under indefinite contract.

Sec. 108. Form of offer - Express offer.

Sec. 109. Offer by acts.

Sec. 110. Communication of offer - Necessity.

Sec. 111. Communication of offer to third party.

Sec. 112. Sufficiency of communication - Standardized communication.

Sec. 113. Contracts with common carriers - Standardized communication sufficient. Sec. 114. Contracts with common carriers - Actual communication requisite.

Sec. 115. Contracts with common carriers - Effect of statutory provisions. Sec. 116. Necessity of communication of offer in rewards.

Sec. 117. Termination of offer.

Sec. 118. Revocation - Power to revoke.

Sec. 119. Effect of simple gratuitous promise not to revoke. Sec. 120. Revocation at auctions.

Sec. 121. Revocation of orders.

Sec. 122. Offer for value - Power to revoke.

Sec. 123. Value as term of contract.

Sec. 124. Nominal consideration for offer.

Sec. 125. Discharge of rights under offer for value.

Sec. 126. Effect of attempt to revoke offer for value.

Sec. 127. Offer under seal.

Sec. 128. Effect of attempt to revoke offer under seal.

Sec. 129. Offers made irrevocable by statute.

Sec. 130. Revocation of offer to be accepted by doing act.

Sec. 131. Illustrations of revocation of offer to be accepted by doing act.

Sec. 132. What constitutes revocation - Revocation by words.

Sec. 133. Revocation by acts.

Sec. 134. Necessity of communicating revocation - Offer to specific individual.

Sec. 135. Offer to general public.

Sec. 136. To whom notice of revocation may be given.

Sec. 137. Rejection of offer - What constitutes.

Sec. 138. Rejection of offer - Effect.

Sec. 139. Lapse of offer by expiration of time - Time not fixed by offer.

Sec. 140. Lapse of offer for future act.

Sec. 141. Time fixed by offer.

Sec. 142. Construction of provisions of offer fixing time.

Sec. 143. What is reasonable time for offer.

Sec. 144. Extension of time of offer.

Sec. 145. Acceptance prevented by offeror.

Sec. 146. Contracts by correspondence - Acceptance of offer open for certain time.

Sec. 147. Lapse of offer by death or insanity of offeror.

Sec. 148. Offer by terms to be accepted after death of offeror.

Sec. 149. Lapse by death of offeree.

Sec. 150. Necessity of acceptance.

Sec. 151. What constitutes acceptance - Intention to accept.

Sec. 152. Necessity of communicating acceptance - Offer to be accepted by promise.

Sec. 153. Offer to be accepted by doing act - Effect of communicating acceptance.

Sec. 154. Necessity of communicating acceptance - Offer to be accepted by act.

Sec. 155. Specific illustrations - Contracts of guaranty.

Sec. 156. Orders for shipment of goods.

Sec. 157. Subscriptions.

Sec. 158. Rewards.

Sec. 159. Necessity of communicating acceptance - Offer to be accepted by act and notice.

Sec. 160. Failure to reject not equivalent to assent.

Sec. 161. Silence as estoppel.

Sec. 162. Silence as acquiescence in account stated.

Sec. 163. Silence as acquiescence in variance of written contract from oral contract.

Sec. 164. Cross-offers.

Sec. 165. Effect of acceptance as concluding contract.

Sec. 166. Retroactive effect of acceptance.

Sec. 167. Acceptance must be positive.

Sec. 168. Acceptance must correspond to offer.

Sec. 169. Acceptance purporting to modify offer.

Sec. 170. Variance as to parties.

Sec. 171. Variance as to form. Sec. 172. Variance as to title.

Sec. 173. Variance as to quantity or quality. Sec. 174. Variance as to price.

Sec. 175. Variance as to time or place of performance.

Sec. 176. Variance as to other terms.

Sec. 177. Reiteration of terms not variance.

Sec. 178. Modification requested as favor.

Sec. 179. Addition of gratuitous promise to acceptance.

Sec. 180. Inquiry as to terms not counter-offer.

Sec. 181. Acceptance under protest.

Sec. 182. Variance as to minor matter.

Sec. 183. Modifications offered after acceptance.

Sec. 184. Conditional or modified acceptance treated as rejection and counter-offer. Sec. 185. Prescribed form of acceptance.

Sec. 186. Waiver of prescribed form of acceptance.

Sec. 187. Methods of express acceptance - Words.

Sec. 188. Offer for promise - Acceptance implied from acts.

Sec. 189. Offers for act construed as offers for promise.

Sec. 190. Offer of promise for act - What constitutes acceptance.

Sec. 191. Acceptance by act which is substantial but-not literal performance.

Sec. 192. Acceptance by act which is not substantial performance.

Sec. 193. Who can accept offer - Offer to definite person.

Sec. 194. Assignment of offer.

Sec. 195. Offer to unascertained person.

Sec. 196. To whom notice of acceptance may be given.

Sec. 197. Distinction between offer and contract.

Sec. 198. Contracts by correspondence - Communication of offer.

Sec. 199. Contracts by correspondence - Communication of acceptance.

Sec. 200. Contracts by correspondence - Practical results of rule - Loss of letter of acceptance in mails.

Sec. 201. Delay of acceptance in mails.

Sec. 202. Revocation of offer after acceptance mailed. Sec. 203. Revocation of acceptance after mailing.

Sec. 204. Lapse after mailing acceptance.

Sec. 205. Breach, etc., after mailing acceptance.

Sec. 206. Contracts by correspondence - Specific provision as to method of acceptance.

Sec. 207. Contracts by correspondence - Communication other than to adversary party.

Sec. 208. When communication by mail or telegraph is proper - Theories.

Sec. 209. What is proper sending by mail or telegraph.

Sec. 210. Contracts by correspondence - Effect of receipt of letter or telegram.

Sec. 211. Contracts by correspondence - Communication of revocation.

Sec. 212. Contract by telephone.

Sec. 213. Effect of intending to reduce contract to writing.

Sec. 214. Place at which contract is made.

Sec. 215. Time at which contract is made.