Members of the jury:   There is evidence to show in 
             this case that the plaintiff, Barbara Scott, prior to March 
             22, 1958, had several accidents resulting in injuries to and 
             about her body, and that she was afflicted with a chronic 
             illness to certain of her female organs.  If you find that 
             such pre-existing condition was latent or dormant before the 
             accident on March 22, 1958, but was brought into activity as 
             a direct result of injuries received by her at the time of 
             this collision, thereby resulting in pain and suffering which 
             were not due to natural progress of such disease or 
             condition, then you should include damages for such pain, 
             suffering and disability, but only to the extent that the 
             same was solely produced by the collision as a natural result 
             thereof. 
                       In considering the question of damages or 
             compensation to be assessed by you in answer to these 
             questions, you are instructed that the duty devolves upon the 
             person claiming damages to convince your minds by the greater 
             weight of the credible evidence and to a reasonable certainty 
             that he or she has sustained damages in the respects inquired 
             about.  You can only allow such damages as have been proved 
             to you to a reasonable certainty. 
                       You cannot allow speculative damages based upon 
             mere guess or conjecture.  In making your assessment of 
             damages, you will in each instance be fair and just and 
             nothing should be added by way of punishment or because of 
             sympathy or resentment, nor should anything be deducted by 
             reason of doubt of the other parties' liability. 
                       You are required to answer the damage questions 
             regardless of how the other questions are answered in the 
             verdict.  The burden of proof on questions No. 1, No. 2, No. 
             3, No. 4, No. 5, No. 6 and No. 16 is on the plaintiff.  The 
             burden of proof on questions No. 7, No. 8, No. 9 No. 10, No. 
             11, No. 12, No. 13 and No. 14 is on the defendant. 
                       By burden of proof is meant the duty resting upon 
             the party having the affirmative of an issue to satisfy or 
             convince the minds of ten or more of you jurors by a 
             preponderance of the questionable evidence of the truth of 
             his or her contentions, and by a preponderance of the 
             evidence is meant the evidence which possesses the greater 
             weight or convincing power. 
                       I charge you further, members of the jury, that the 
             convincing power of the evidence is not necessarily 
             determined by the number of witnesses.  It may be that the 
             testimony given by one witness has greater convincing power 
             than that given by certain witnesses contradicting or tending 
             to contradict that given by one, although when all the 
             circumstances are equal, the greater number of witnesses 
             would carry the greater convincing power. 
                       Now, members of the jury.  You are the sole and 
             responsible judges of the weight and credit to be given to 
             the testimony of each and every witness whose testimony has 
             been received on this trial.  In considering the credibility 
             of any of the witnesses, you have a right to consider his or 
             her interest in the result of this trial.  The temptation 
             that may exist under the circumstances to testify falsely, 
             and everything appearing in the case bearing upon his or her 
             credibility, and you are to give to such testimony such 
             weight as you think it is entitled to, no more and no less.