The phrase "and secondly the numbers" is correct and usable in written English.
It can be used when listing points or arguments in a structured manner, particularly when introducing a second point related to numbers.
Example: "First, we need to consider the budget; and secondly, the numbers will help us determine the feasibility of the project."
Alternatives: "and in addition, the numbers" or "and next, the numbers".
Firstly, socioeconomic variables and land use variables were broken into building gross floor area (GFA), and secondly the number of buildings and activities in each zone was measured.
Firstly, the number of people rescued alive, which stands at 2,438 and secondly, the number of bodies recovered from the rubble, which stands at more than 1,000 and keeps rising every day.
When n < 9, the average number of collision-set-n climbs up because of two reasons: firstly, the probability of generating collisions increases as the number of interfering readers grows, and secondly, the number of potential subsets that may generate collisions grows with the cardinality n.
First, the number of dead cells was measured and secondly the total number of cells was measured.
I was struck by a couple of things - firstly the level of development going on and secondly the disproportional number of barber shops - but then I guess somebody has to cater for the maintenance of all those 'big' beards.
As in Table 2, universities are sorted primarily by the number of researchers they have hired and secondly by the number of indications received by these researchers.
Supplementary material Fig. A.14 shows the functional site coverage firstly against the number of superfamilies with this coverage and secondly against the number of domain sequences in superfamilies with this coverage.
The analysis of copy number status using MLPA includes two steps: the comparison of the copy number ratios of the patient sample with the internal reference probes and, secondly the comparison of the copy number ratios of a patient sample with normal tissue (healthy tissue in which copy number for the reference probes and genes of interest are expected to be normal).
PCB congeners were grouped first by number of ortho-substituted chlorines and secondly by the number of total chlorines.
Firstly, the total number of reads for each coding DNA sequence (CDS) was calculated and converted to reads per kilobase per million mapped reads (RPKM numbers), and secondly the genes that were differentially regulated between the stages corresponding to pH 6.3 and 7.3 were identified.
