lecture_bottle  lot_number  solution  headspace  N2_injection  
Sigma_A3        SZ1670V     250       50         0.2           
Sigma_A3        Standard    250       50         0.2           
Cambridge_B     I-16727     250       50         0.2           
Cambridge_B     Standard    250       50         0.2           
controls        Control     250       50         none          
controls        Standard    250       50         none